INTERACTIVE SYMPTOMATIC RECORDING SYSTEM AND METHOD UTILIZING SYMPTOMATIC MEMORY
The Internet provides communication between a plurality of service sites and a plurality of equipment sites at which equipment needing periodic service and emergency service are operated. Each piece of equipment includes a sensor array and a manual actuator that is activated when an abnormal mode of operation of the equipment is experienced. When the manual actuator on a piece of equipment is actuated, the equipment's operating conditions that are sensed by the sensor array are stored in memory. Later, when a request to service the equipment is sent from an equipment site to a service site, the service site queries the equipment site as to equipment symptoms. Upon receiving this query, an operator at the equipment site causes the symptoms stored in memory to be transmitted to the service site. Based upon the symptoms received at the service site, a service plan for the equipment is formulated.
This application is a continuation in part of copending U.S. patent application Ser. No. 09/122,404 filed Jul. 25 1998 and of copending U.S. patent application Ser. No. 09/880,973 filed Jun. 14, 2001, which patent application Ser. No. 09/880,973 is a continuation of application Ser. No. 09/122,404.
BACKGROUND OF THE INVENTION1. Field of the Invention
This invention relates to interactive computerized systems and methods for obtaining and processing information. More particularly, the invention pertains to an interactive system and method for receiving information regarding a customer, equipment such as an automobile, a tractor and/or trailer, a fork lift, cherry picker or front loader, and symptomatic problems that prompt the need for service or repair of the equipment, and the processing of the symptomatic information to generate equipment work and parts orders for the customer, for parts suppliers, and for service personnel. The invention further pertains to the transmission of work completion data to accounting and/or quality control subsystems. While the invention is usable for servicing a variety of equipment, it will be primarily described here in terms of automobiles because the description of this example addresses most, if not all, of the problems relative to a large repair shop for such equipment.
2. Description of the Related Art
Dropping off equipment at a dealership or service site for service can be a time consuming and frustrating activity. Even though such organizations may open as early as 7 a.m. and stay open until 6 p.m. or so in order to accept equipment for service, these hours are not always long enough to accommodate all customers. Consequently, some customers find it necessary to drop off their equipment off during hours that the service centers are closed. With automobiles, for example, the driver usually leaves the automobile keys in an envelope upon which the driver writes observed problems, and requests service of these problems. The envelope is usually then put into a cubicle, which locks on closure. In such instances, the symptom situation is not always communicated effectively. Even when the repair shop is open, the customer may need to wait some time in order to provide the necessary information to a service manager or other representative, thus creating further delays. The above process is improved by using the modern computer technology of this invention.
The present invention provides an interactive, user friendly, symptomatic recording system for the driver or other equipment operator, i.e. the customer. The customer can answer basic menu-driven queries and/or prompts, and the system prepares and transmits to the repair center a preliminary symptomatic report including the symptom or symptoms that prompted the need for repair or service, including the frequency of occurrence of the problem symptoms. For example, problems could be hard starting in the cold, which problem has never happened before. The system of the invention is particularly useful for use outside of the normal operating hours of the repair facility.
Representative of the art is;
U.S. Pat. No. 5,214,582, issued to Gray, teaches interactive diagnostic systems and methods for automotive vehicles of the type having networks of sensors and actuators for sensing and actuating various functions in the vehicle and onboard computers for monitoring sensors and controlling the actuators. An external computer is used to control selected actuators independent of the onboard computer and for simulating operation of selected sensors. At the same time, the electronic data entering and existing the onboard computer is monitored and analyzed by the external computer for trouble shooting purposes.
U.S. Pat. No. 5,513,107, issued to Gormley of Ford Motor Co., teaches methods and apparatus for controlling operating subsystems of motor vehicles. Diagnostic maintenance services for the vehicles are provided by monitoring various operating subsystems connected to a vehicle controller and recording diagnostic data. Such data can be periodically communicated to a service center which determines the service(s) needed and communicates their conclusions back to the vehicle controller where it is displayed to the vehicle operator.
U.S. Pat. No. 5,557,268, issued to Hughes et al. of Exxon, teaches an automatic vehicle recognition and customer automobile diagnostic system. Each vehicle includes a transponder that transmits a Radio Frequency (RF) code so that vehicle diagnostic measurements made upon entry to the service facility can be associated with the specific vehicle and displayed to the customer in their service area.
U.S. Pat. No. 5,058,044, issued to Stewart et al., teaches a system for automatically identifying vehicles assimilating data from the identified vehicle, correlating the data with predetermined data and providing a statement of account for a transaction involving the vehicle. A service record for the vehicle is prepared by the system for use in connection with such transactions. Data for the service record is provided primarily by onboard sensors, but may be augmented by data submitted via an onboard keyboard.
U.S. Pat. No. 4,602,127, issued to Neely et al., teaches a vehicle diagnostic system comprising a portable communications control station and a remote data processing station. A portable communications controller is connected to a vehicle data terminal to obtain data from the vehicle's onboard computer.
U.S. Pat. Nos. 4,975,847 and 5,065,023, both issued to Abe et al., teach motor vehicle diagnosis systems.
U.S. Pat. No. 5,541,840, issued to Gurne et al. of Chrysler Corporation, teaches a hand-held automotive diagnostic service tool which can operate with a master station to monitor, display, and process vehicle data and diagnose fault conditions. Service manual pages can be displayed and parts ordered on-line.
U.S. Pat. No. 5,533,093 teaches an automated troubleshooting mechanism incorporated into portable test and communications equipment for telephone lines. Work order manager software is employed.
U.S. Pat. No. 4,916,441 teaches a hand-held pocket terminal having a display screen and bar code reader for use in conjunction with patient medical care.
Various aspects of interactive CRT touch panel displays are taught by U.S. Pat. No. 4,449,186 (to Kelly et al.), U.S. Pat. No. 5,404,443 (to Hirata), U.S. Pat. No. 5,488,575 (to Danielson et al.), U.S. Pat. No. 5,499,707 (to Steury) 1 U.S. Pat. No. 5,537,315 (to Mitcham) and U.S. Pat. No. 5,539,429 (to Yano et al.). Such touch panels have been found useful in facilitating communications in a variety of customer service contexts.
The Super Advisor System marketed by Automatic Data Processing, Inc., of Hoffman Estates, Ill., USA, allows Service advisors to use a hand-held, wireless pen pad computer system to select or decline maintenance items displayed on the computer's screen and to describe vehicular problems via a series of checklists and multiple choice questions. The system also provides customer appointment management, etc., using Microsoft Windows.
SUMMARY OF THE INVENTIONOne aspect of the present equipment serving invention is to provide an efficient system and process for obtaining, recording and utilizing appropriate information about a vehicle, and why it requires service from a customer, this system including use of the Internet.
In an embodiment of the invention the Internet provides for communication between a plurality of service sites and a plurality of equipment sites at which equipment needing maintenance, repair, periodic service and/or emergency service are operated. Each piece of equipment includes a sensor array and a manual actuator that is activated when an abnormal mode of operation of the equipment is experienced. When the manual actuator on a piece of equipment is actuated, the equipment's operating conditions, as sensed by the sensor array, are stored in memory. Later, when a request to service the equipment is sent from an equipment site to a service site, using the Internet, the service site queries the equipment site as to equipment symptoms. Upon receiving this query, an operator at the equipment site causes the symptoms stored in memory to be transmitted to the service site, again using the Internet. Based upon the symptoms received at the service site, a service plan for the equipment is formulated.
The invention provides a system for obtaining such symptom information without the need for the presence of a representative of the repair shop.
Yet another aspect of the invention is to provide a complete, concise, and readable repair/service order for the mechanics, for parts suppliers, and for the customer.
These and other objectives are fulfilled by a preprogrammed and interactive computer systems for obtaining vehicle information, problem symptoms and a request for service from a customer, and for developing work orders and parts orders based upon the information that was supplied by the customer. The system includes:
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- Interactive input, display, computing and storage mechanisms for querying the customer, for receiving inputs of information from the customer, and for storing the provided information;
- A preprogrammed central computer processing unit(s) for ordering successive presentations of appropriate queries for presentation to the customer via the display means;
- A compiler to summarize inputs received from the customer, and for processing a summary of a work order and/or a parts order; and at least one printer to print a work order for use by both the customer and a mechanic, to process billing records, and to process reminders relative to vehicle service and relative to future service.
Optionally, an input mechanism can be provided to transmit data upon completion of the service work to an accounting module or to a subsystem to facilitate preparation of a bill for services and a notification to the customer by an accounting department. Such data can also be transmitted to a quality control subsystem.
Further input and display mechanisms are provided for the mechanic, for the service representative, or for the layperson using the system to check and provide status information about the automobile's current service program. A data bank is provided to receive and maintain current status information on work assignments being performed for customers and cars. Interactive communication units are provided to originate and receive calls to and from customers regarding the status of the work assignments on their cars. Interactive communication units are also provided to initiate and execute orders for service, for supplies, and for parts from dealer stock or from external providers.
Other components of the system include interactive computer monitor screens which identify relevant portions of the vehicle, the locations therein, and symptoms. Input mechanisms for the system include touch activating monitor screens and keyboards. A database of scheduled and unscheduled periodic maintenance tasks for various types of vehicles serviced can be linked to the pertinent query screens. This database information can be provided at a geographic distance by use of the Internet or locally through computer memory. Programmed query sets include the categories of engine/drivability, noise/vibrations, transmission, 2 and 4-wheel or more drive, heater/AC, brakes, steering/suspension, power accessories/electrical, and miscellaneous other services.
Further, an interactive computerized process is provided for receiving customer inputs, for compiling and summarizing those inputs, and for developing work orders for service personnel and non-layperson technicians identifying the symptomatic problems that prompted the layperson to seek automobile repair and maintenance. This is accomplished by steps including:
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- querying the customer and receiving inputs regarding the customer and the automobile ID via computer input and output systems using programmed sets of questions regarding specified vehicle systems and categories regarding the maintenance and/or repairs;
- selecting services which are requested and/or needed, including investigative work;
- printing, storing and displaying work orders including the provided customer and vehicle ID and assigned services for both the customer and assigned mechanics, and
- printing reminders for use by the equipment owner or by equipment service personnel relative to prior history, dates or usage mileposts requiring further service, or bar-coded information for future reference.
Like reference characters designated corresponding parts in the several views.
Console 10 can include a portable personal computer or, at least, a freestanding terminal serving a master computer. Console 10 comprises input means and interactive display means, such as a touch-active CRT screen such as disclosed in U.S. Pat. Nos. 4,449,186, 5,404,443, 5,488,575; 5,499,707; 5,537,315, and 5,539,429 incorporated herein by reference. Such touch-active screens may incorporate audio output means, as disclosed in U.S. Pat. No. 4,449,186. The system of the invention is designed so that hardware and software cooperate to provide convenient means for the customer to provide the necessary symptomatic information to facilitate service/repair. In the embodiment using a touch active CRT screen, most information is provided via the touch-active screen in response to a menu-driven series of queries or prompts. Some of the input information (i.e., vehicle ID, customer ID, credit card payment information, and the like) can be provided by inserting into a card reader 20 a credit card or other identity card issued by the repair center to minimize effort on the part of the customer, and to minimize errors as well. Such cards can be used to unlock and provide access to console 10 and other input devices to minimize vandalism or other unauthorized activities. Alternatively, systems can be used which automatically sense the vehicle ID and/or the condition of the vehicle systems such as; for example, an optical/magnetic reader 40, see e.g., U.S. Pat. No. 5,058,044. To augment the touch-active screens, a standard or simplified alphanumeric keyboard 30 can be provided, and optionally provisions can be made for the customer to dictate into the input system using devices such as the voice-activated system disclosed in U.S. Pat. No. 5,586,037.
In addition to the customer direct input of ID data, observed symptoms, and requests at this intake transaction, the customer may be assisted by a service advisor or by other representatives of the repair center. Such representatives may enter information at console 10, and/or use a hand-held device such as disclosed above. Optionally, readings may be taken from the vehicle onboard computer 50 at this point using a hand-held unit or other computerized monitor. In this way, error codes from the onboard computer can be read, analyzed, and considered in writing up a vehicle service order. This mode of operation will normally be available only if the customer is willing to wait and if there is a repair center representative available to take the readings, unless an automatic sensor system is used as in U.S. Pat. No. 5,557,268. A service advisor may introduce information into the system via console 10, either during the customer intake transaction or thereafter. Preferably, the service advisor will employ a hand-held unit incorporating the functions of console 10.
Console 10 displays menus, queries, prompts and input/output data on a CRT screen, and upon command, or upon completion of the transaction, a printer 90 prints out materials, or other similar printers 90 can be attached to the system by way of input devices or networked to computing device 70 for the customer's use.
The information inputs all enter computing device 70 that could include a programmed computer, as shown, having a Central Processing Unit (CPU), a device having firmware embedded into microchips, a general personal computer having specialized application programming. The information entered into computing device 70 is analyzed, summarized, compiled, and correlated. The system may query the customer further to fully develop the input information before closing the transaction. When the initial information is obtained, the system prepares a service order that includes a standardized reporting of the symptomatic problems that prompted the lay person to seek repairs of the vehicle. The present invention can be combined with a diagnostic service program that outputs service needs when the needed service and/or repairs are clear. More typically; however, more information is needed to determine the service required; therefore, the system can print out and display a standardized summary of the symptomatic problems containing queries for the mechanic and/or service advisor to analyze. The service mission is subject to change after readings have been taken from the vehicle onboard computer.
A finished service order will be transmitted to mechanic, service representative, technician or other professional via printer 90 and/or console 10, which displays the order on a CRT screen. Using similar input means to those described for console 10, the mechanic can submit information to modify the service order, query the service advisor as to what work is approved, and advise the system when the job is completed or delayed. Such inputs are transmitted to computing device 70, which then stores and processes the inputs. Events including job completion or delay are transmitted via suitable communications media, such a telephone, facsimile, or e-mail, to the customer using customer notification programs. Additionally, in the process of the service/repair job, computing device 70 can be used to optionally identify and order materials, spare parts and the like for the service/repair using an ordering program.
Upon completion of the interrogation via the categorical subroutines, the customer is automatically transferred to “Additional Services” subroutine 150, which offers further choices discussed below for routine service operations and the like. Once the customer exits this menu, the customer is transferred to subroutine 155 which uses Boolean and other processing logic to provide a compilation of the symptoms and of requested service items and displays the compilation along with a menu of additional accessories or services which can be purchased. Following this, subroutine 160 provides a cost estimate of any requested maintenance services, and subroutine 165 provides a cost estimate of repair costs and pickup time. The repair/work order is presented by subroutine 170, and the customer's electronic signature is then captured. On signature of the repair order, instructions for leaving the key(s) in a secure depository are shown at 173. Subroutine 175 then queries whether the customer will wait for the vehicle, drop it off, or request a loaner vehicle. Subroutine 175 also queries the customer's requests with regard to the disposition of the used parts. Finally, at step 180 the finished repair estimate is displayed and printed out for the customer, for the service advisor and for the mechanic, technician or other professional service provider.
As shown in
Various combinations of commercially available computer hardware can be used to assemble the system of the invention. Computer support can range from a single personal computer or a microcomputer to a master computer with multiple terminals. Portable or hand-held terminals or computers can be used to facilitate the collection and transmission of data. The computer support mechanisms preferably include a central processing unit, at least one compiler, data storage devices including disk drives and the like, at least one monitor with a display screen, a modem, an interactive media device and input/output mechanisms. The computer system is configured, as required, by the particular programs to be run with capacities and rates suitable to provide reasonable response times.
Input mechanisms can include conventional keyboards and/or keypads, interactive touch screens, and screens with icons, such a graphical user interfaces, that are responsive to manual input, devices, such as a “mouse,” optical and magnetic readers, and data input ports. Preferably, the input mechanisms include touch-active display screens. Such screens permit interaction between a user and the computer in response to the user touching the screen with an object such as a finger or a pointing device. As disclosed in U.S. Pat. No. 5,537,315, such pointing devices can include a light pen, sonic pen, voltage pencil, stick, or wand. Other input mechanisms to the system, if not directly to the computer, may include smart card devices, such as conventional credit card readers, for receiving data about the customer and/or about the vehicle to be serviced, plus payment information such as credit card numbers. One suitable credit card reader is disclosed in U.S. Pat. No. 4,449,186, column 1.
Optionally, the input mechanisms can include a voice-activated system, such as a digitized voice recognition system for receiving user input, such as those pioneered by Dragon Systems, Inc., San Rafael, Calif.
The computer support mechanisms preferably include at least one hand-held or portable terminal which permits data to be input to the system via a keypad or keyboard or an equivalent device. This permits a service advisor and/or a mechanic to receive data and to input data conveniently from the vehicle. Such terminals have become commonly available and can be designed or purchased and modified to interface with the system. A representative example of such terminals is found in U.S. Pat. No. 5,468,575.
Because most contemporary automotive vehicles include onboard computers which receive information from sensors, control various systems via actuators, and record various failures of equipment, input mechanisms for the system include mechanisms for reading and analyzing data from such onboard computers. Any suitable mechanism can be used which allows such data to be read, analyzed, and input to the computer or to the system. One example is the “hand-held automotive diagnostic service tool”, of U.S. Pat. No. 5,541,840, which is incorporated herein by reference. As disclosed in U.S. Pat. No. 4,602,127, many modern vehicles include mechanisms for obtaining direct access to the data of such onboard computers on a real-time basis. Inputs to the system can also be provided by automatic vehicle recognition and diagnostic systems such as those disclosed in U.S. Pat. No. 5,557,268.
Output mechanisms can include display mechanisms, such as CRT display screens of computer monitors, printers, and program-actuated facsimile, credit checking devices, and/or telephone devices. The printer(s) can be any suitable unit(s) selected from commercially available models, such as laser or ink jet printers.
Computer programs or software subsystems or modules are used to carry out various tasks for which the systems are employed. Many of these subsystems can be obtained or modified from existing commercial programs. In any case, the required programs can readily be provided by those of ordinary skill in the art in view of the teachings herein. For instance, accounting and billing programs are readily available and can be obtained or modified to provide a statement of account for services performed. Programs for receiving and analyzing the data stored in vehicle onboard computers are also available. However, the most important part of the diagnostic process will still generally be the analysis by the mechanic and/or service manager of the information provided by such programs and the vehicle's driver. Service order writing programs are generally available; see, e.g., U.S. Pat. No. 5,058,044.
Programs to generate and/or to access a service record for the vehicle(s) being serviced are also available. Technical library or database programs can be used to provide access to scheduled and unscheduled maintenance operations, service and parts manuals for the mechanic as well as for the customer. Programs for identifying and ordering parts are also available. However, such programs will generally be tailored or prepared especially for users of the particular systems of the invention.
The figures provide an exemplary mechanism for obtaining the vehicle driver's input. They do not include a listing of all possible options with respect to automobiles. Additional categories 9 for “Mechanical” systems and 10 for “Hydraulic or Pneumatic” systems include the “What”, “Where”, and “When” questions of the previous categories, and will provide feedback subroutines necessary to handle vehicles other than automobiles and mechanical equipment for grading, lifting, moving, etc., various items and/or products.
Each individual remote site is designated as a remote site 1 through a remote site N, and each individual service site is designated as a service site 1 through a service site M. Each of the remote sites 1 through N can, for example, comprise a personal computer (PC) that is located within the home of an individual equipment or automobile owner, whereas each service site 1 M may comprise a PC that is located within the service facility of an equipment repair company, such as the repair department of a automobile dealership.
Each one of the individual service sites 1 through M provides for its own web site within the Internet, these individual web sites being designated web site 1 through web site M, wherein web site 1 corresponds to service site 1, etc.
Computing equipment at each of the customer sites (i.e. remote sites) and at each of the service sites enables bidirectional communication between the customer sites and the service sites by way of the Internet.
Each of the web sites 1 through M is constructed and arranged to enable any given customer site 1 through N to input information relative to a piece of equipment or automobile that is to be serviced, as is described above.
In some cases, a given service site may provide service for only one type of equipment. In other cases, a given service site may provide service for a number of types of equipment, for example a number of different brands of automobile. In this later case, that service site's web site is constructed and arranged to enable a customer site to initially make a selection as to the particular type/brand of equipment that is to be serviced, this being followed by the inputting of information in accordance with the invention and as described above, relative to the particular type/brand of equipment that is to be serviced.
For example, should the automobile owner at remote site 3 desire to have his/her brand X automobile serviced by service site 5, this owner uses a PC, perhaps at his/her home, to access web site 5. If service site 5 services more that one brand of automobile, the owner at customer site 3 now accesses that portion of web site 5 that is associated with the brand X automobile. Thereafter, the owner at customer site 3 inputs information as above described relative to the service that is needed and/or relative to unusual operating symptoms that the owner has experienced relative to his/her particular brand X automobile.
The brand X owner may propose a time/date at which this particular automobile will be brought to service site 5 for service. Upon receipt of this Internet communication from remote site 3, service site 5 responds by sending a confirmation of service message, perhaps proposing a different time/date. Thus, by way of a two-way Internet communication between remote site 3 and service site 5, an agreement is reached that facilitates the servicing of this particular brand X automobile by service site 5.
In
Sensor array 102 could comprise a large number of individual sensors or one sensor, the detail of which is not critical to the invention. It suffices to say that sensor array 102 is operable to monitor the instantaneous state of operation of at least one operating parameter of automobile 100.
More generally, sensor array 102 monitors the operation of a number of automobile components, and the state of a number of operating conditions of the automobile, which components/conditions may generate symptom-related outputs that are of interest to service personnel when analyzing symptoms, and thereafter determining procedures for servicing the automobile.
By way of non-limiting examples, sensor array 102 may monitor tire pressure, vehicle speed, engine revolutions (RPM), engine temperature, engine oil pressure, hydraulic steering/brake/transmission pressures, automobile vibration, the angle of front wheel turning, air conditioner on or off, heater on or off, brakes applied or not applied, various electrical accessories on or off, automobile noise level, convertible top up or down, and the transmission range that is currently operative to apply engine power to the drive wheels.
When the operator of automobile 100 experiences (i.e., senses) an abnormal mode of operation of the automobile, the operator manually actuates button 106 that is mounted, for example, on the steering wheel of the automobile. This action by the operator enables network 104 whereby computer chip 101 is commanded to read-out sensor array 102 and to store the content of sensor array 102 in non-volatile memory 103.
Later, when requesting service of automobile 100, the owner connects computer chip 101 to the service cite, and in response to a symptom query from the service site, the stored symptom content of memory 103 is presented to the service site. When that owner's automobile 100 is located at a
When communication involves using the Internet, the owner accesses a desired web site, as above described relative to
While the two actuating means 106 and 107 have been described as manually operable means, the spirit and scope of the invention includes the use of other equivalent actuating means, non-limiting examples of which include voice responsive actuating means and radio frequency actuating means.
In addition, while the manner of communicating the content of memory 103 to a remote site has been described as using a cable 108, the spirit and scope of the invention includes the use of other equivalent communicating means, a non-limiting example is a RF communicating means.
After the stored symptom content of memory 103 has been presented to the service site, memory 103 is erased to prepare for another occasion of use in response to the occurrence of an abnormal mode(s) of operation of automobile 100.
Claims
1-20. (canceled)
21. An equipment operating condition recording device to record operating conditions during abnormal equipment operations sensed by a lay person to allow a service provider to reproduce operating conditions substantially identical to operating conditions during an abnormality sensed a lay person, comprising:
- at least one actuator, the at least one actuator is responsive to an action by a lay person;
- at least one sensor to monitor at least one operating condition of the equipment and to provide at least one output indicative of the at least one operating condition being monitored; and
- at least one memory for recording the at least one output, such that when the at least one actuator is actuated by the lay person during when the lay person senses the abnormality, the at least one memory records the operating condition of the equipment during the abnormality, such that the abnormality can be recreated from the at least one output stored in the at least one memory.
22. The device of claim 21, wherein the recorded operating condition is the instantaneous operating condition.
23. The device of claim 21, wherein the at least one sensor is at least two sensors.
24. The device of claim 21, further comprising:
- a read out module capable of downloading the recorded operating conditions to a service site such that the service site can duplicate the operating conditions that prompted the lay person to actuate the at least one actuator.
25. The device of claim 24, wherein the read out module downloads operating conditions to the service site using a protocol, the protocol comprises at least one of wireless protocols, internet protocols, radio frequency protocols, and telephoney protocols.
26. A device for recording operating conditions of a piece of equipment when a lay person senses an abnormality, comprising:
- means for actuating at least one sensor, the means for actuating responsive to an action of the lay person;
- means for sensing the operating conditions of the piece of equipment during the abnormality;
- means for storing the sensed operating conditions during the abnormality; and
- means for downloading the stored operating conditions to a service site, whereby the operating conditions of the piece of equipment when the lay person sensed the abnormality can be substantially duplicated.
Type: Application
Filed: Feb 12, 2007
Publication Date: Nov 29, 2007
Inventors: Ernst Reichwein (Littleton, CO), Joseph White (Littleton, CO)
Application Number: 11/673,994
International Classification: G01M 17/00 (20060101);