Patents by Inventor James C. Chen
James C. Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6304097Abstract: A system, an IC chip, a test structure formed on the IC chip, and a corresponding method for modeling one or more target interconnect capacitances is disclosed. The test structure comprises an interconnect configuration comprising a test interconnect and one or more target interconnects. The interconnect configuration has, for each target interconnect, a corresponding target interconnect capacitance between the test interconnect and the target interconnect. The test structure also comprises a test interconnect charging circuit connected to the test interconnect. The test interconnect charging circuit is configured to place a test charge on the test interconnect. The test structure further comprises one or more target interconnect charging circuits. Each target interconnect charging circuit is connected to a corresponding target interconnect.Type: GrantFiled: January 8, 2001Date of Patent: October 16, 2001Assignee: BTA Technology, Inc.Inventor: James C. Chen
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Patent number: 6300765Abstract: A system, an IC chip, a test structure formed on the IC chip, and a corresponding method for modeling one or more target interconnect capacitances is disclosed. The test structure comprises an interconnect configuration comprising a test interconnect and one or more target interconnects. The interconnect configuration has, for each target interconnect, a corresponding target interconnect capacitance between the test interconnect and the target interconnect. The test structure also comprises a test interconnect charging circuit connected to the test interconnect. The test interconnect charging circuit is configured to place a test charge on the test interconnect. The test structure further comprises one or more target interconnect charging circuits. Each target interconnect charging circuit is connected to a corresponding target interconnect.Type: GrantFiled: February 9, 1999Date of Patent: October 9, 2001Assignee: BTA Technology, Inc.Inventor: James C. Chen
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Patent number: 6281611Abstract: A method and apparatus for heating substances such as beverages, soups, chemicals, etc., with heat produced by circulating electrical eddy currents. In one form of the device, a magnetic flux generating base produces a varying magnetic field by using an electric motor to move a plurality of permanent magnets. The varying magnetic field induces the eddy currents to circulate in a ferromagnetic conductor that is sealed in the bottom of a container resting on the magnetic flux generating base. Losses due to the eddy current produce heat that is transferred into the substance within the container. In another embodiment, the motor moves one or more magnetic flux shunts to vary the magnetic field experienced by the ferromagnetic conductor. The presence of the container on the magnetic flux generating base can be detected and used to control the operation of the electrical motor.Type: GrantFiled: April 11, 2000Date of Patent: August 28, 2001Assignee: Light Sciences CorporationInventors: James C. Chen, Darrin Huston
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Patent number: 6273904Abstract: Several different embodiments of a flexible polymer battery are disclosed in connection with providing a medical therapy. For example, the electrical current from the polymer battery may be used to energize light sources for administering light therapy. In one embodiment, the polymer battery is formed as a substantially elongate structure having one end attached to an internal receiver coil, and the other end attached to a medical device such as a light probe that is adapted to be implanted within a patient's body. The polymer battery thus provides a conductive link between the internal receiver coil, which is electromagnetically coupled to an external transmitter coil for recharging the battery, and the light probe which is energized with current supplied by the flexible polymer battery. In another embodiment, the polymer battery is used to support a substrate on which a plurality of light sources are mounted in spaced-apart array.Type: GrantFiled: March 2, 1999Date of Patent: August 14, 2001Assignee: Light Sciences CorporationInventors: James C. Chen, David J. Brown, Brian D. Wilkerson, Charles M. McQuade, Darrin Huston
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Patent number: 6238426Abstract: Progress of photodynamic therapy (PDT) administered over an extended period of time is monitored using an ultrasonic probe, which produces ultrasound images of an internal treatment site in real time. The ultrasound images indicate the extent and volume of an infarction zone within a tumor or other diseased tissue at the internal treatment site within a patient's body. Light is administered to the internal treatment site from either an internal or external light source that produces light in a waveband corresponding to the characteristic absorption waveband a photoreactive agent that is administered to a patient. Prior to or shortly after initiating administration of the light therapy, a baseline ultrasound image is produced for comparison to subsequent ultrasound images made after the effects of the PDT on the diseased tissue have occurred.Type: GrantFiled: July 19, 1999Date of Patent: May 29, 2001Assignee: Light Sciences CorporationInventor: James C. Chen
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Publication number: 20010000948Abstract: A system, an IC chip, a test structure formed on the IC chip, and a corresponding method for modeling one or more target interconnect capacitances is disclosed. The test structure comprises an interconnect configuration comprising a test interconnect and one or more target interconnects. The interconnect configuration has, for each target interconnect, a corresponding target interconnect capacitance between the test interconnect and the target interconnect. The test structure also comprises a test interconnect charging circuit connected to the test interconnect. The test interconnect charging circuit is configured to place a test charge on the test interconnect. The test structure further comprises one or more target interconnect charging circuits. Each target interconnect charging circuit is connected to a corresponding target interconnect.Type: ApplicationFiled: January 8, 2001Publication date: May 10, 2001Applicant: BTA TECHNOLOGY, INC.Inventor: James C. Chen
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Patent number: 6222644Abstract: The invention relates to a card reader kit for scanning a plurality of small documents by using an image scanner and a computer system, and generating a document image file for each of the small documents automatically. The card reader kit comprises a plurality of blocks for placing the small documents and the system comprises a form file which comprises the location of each block on the card reader kit. The method comprises the steps of: (1) placing each of the small documents on one block of the card reader kit; (2) scanning the card reader kit coupled with the small documents into the system to generate a master image file; (3) processing the master image file by using the form file to generate a document image file for each of the small documents.Type: GrantFiled: July 19, 1996Date of Patent: April 24, 2001Assignee: Acer Cummunications and Multimedia Inc.Inventors: James C. Chen, Lin Sung-Hui
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Patent number: 6210425Abstract: A system having a plurality of light sources that emit light focused to treat an internal treatment site at a location determined using an imaging device that is integrally mounted in a housing with the plurality of light sources. The imaging device may include, for example, either an ultrasonic transducer or a gamma probe that produces a signal suitable for displaying an image of the internal treatment site. The image thus displayed enables the location, shape, extent, and depth of the internal treatment site to be determined so that an operator can correctly position the housing in which the imaging device and light sources are disposed. Each light source is provided with either a conventional refractive lens or a totally internally reflective (TIR) lens that directs and focuses the light at the appropriate depth within a patient's body.Type: GrantFiled: July 8, 1999Date of Patent: April 3, 2001Assignee: Light Sciences CorporationInventor: James C. Chen
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Patent number: 6138681Abstract: The alignment and positioning of an external device relative to an internal device is indicated on a display and/or by an acoustical signal. In the disclosed application, the external device transcutaneously transmits electromagnetic energy to an internal receiver to provide electrical power for an implanted medical device. To ensure optimal coupling between the external transmitter and the internal receiver, two permanent magnets are disposed at spaced-apart positions on the internal receiver. The magnetic field strength of the permanent magnets is sensed by a pair of correspondingly spaced-apart Hall effect sensor on the external transmitter. As the external transmitter is moved about over the internal receiver, the signals produced by the Hall effect sensors drive a display of light emitting diodes (LEDs) that indicates when the maximum magnetic field strength is achieved, i.e.Type: GrantFiled: October 13, 1997Date of Patent: October 31, 2000Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, Brian D. Wilkerson, Darrin Huston
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Patent number: 6112277Abstract: A staging method and means for both device read and update write operations in which messages and commands between a storage subsystem and a fixed-block formatted RAID array emulating a variable-length record (CKD) formatted device for both read and write operations are evaluated to ascertain whether the record addressing was random and truly in record mode. If they are in that mode, then partial track staging by the RAID array control from the fixed-block formatted HDDs to a subsystem cache or the like would reduce device contention by reading and staging less than full track.Type: GrantFiled: September 25, 1997Date of Patent: August 29, 2000Assignee: International Business Machines CorporationInventors: Thao B. Bui, James C. Chen, Chan Y. Ng
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Patent number: 6096066Abstract: A flexible patch provided with a plurality of light sources mounted in spaced-apart array on its undersurface and covered with an optically transparent polymer material. The light sources are energized with an electrical current supplied by a flexible polymer battery, which is preferably rechargeable. Electrical current is conveyed through a lead that extends from the flexible battery to the flexible patch and then through an electrical circuit that includes a plurality of conductive traces formed using a conductive ink applied to the surface of a flexible substrate that supports the light sources. The thickness of the flexible patch at its maximum is less than 1.0 millimeters. The light sources can be separately grouped, and the electrical current supplied to each group individually controlled to achieve a desired light intensity and/or duration exposure to the light therapy over different portions of the undersurface of the flexible patch and different portions of the treatment site.Type: GrantFiled: September 11, 1998Date of Patent: August 1, 2000Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, Brent Wiscombe
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Patent number: 6092531Abstract: An external power head is energized by a motor causing movement of an element that produces a varying magnetic field, thereby inducing power in an implanted receiver coil within a patient's body. The external power head includes either one or more moving permanent magnets, or one or more moving elements that vary the magnetic flux coupled to the implanted receiver coil. As a result of the varying magnetic field experienced by the implanted receiver coil, an electric current flows from the implanted receiver coil to energize an implanted medical device.Type: GrantFiled: June 3, 1999Date of Patent: July 25, 2000Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, David J. Brown, Darrin Huston, Brian D. Wilkerson
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Patent number: 6080160Abstract: A method and apparatus for selectively engaging and disengaging an anchor to fix a medical device at a selected site within a patient's body. A shape memory alloy (SMA) such as Nitinol is used to fabricate one or more anchors for the medical device. The shape memory effect exhibited by the SMA is thermally activated. One embodiment of the anchor has a substantially circular shape when at its martensite temperature and reverts to an elliptical shape at its austenite temperature. Another embodiment is a substantially straight strip at its martensite temperature and has an end that curls to engage tissue when at its austenite temperature. Still another embodiment includes a pair of anchors that extend outwardly from each side of an elongate probe at their austenite temperature and retract inwardly against the sides of the probe at their martensite temperature. The change in the shape of the SMA elements tends to anchor the medical device or probe at the treatment site.Type: GrantFiled: December 4, 1996Date of Patent: June 27, 2000Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, Brent Wiscombe
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Patent number: 6038676Abstract: System and method aspects for avoiding data corruption during data transfer in a disk array environment are described. In a circuit aspect, an integrity checker includes counting logic for counting fields in the data being transferred. The integrity checker further includes comparison logic for comparing a constant value and a value in a predetermined field of data being transferred. Combinational logic is further included and coupled to the comparison logic and counting logic, wherein when the comparison logic results in a miscompare and the counting logic is at a predetermined count value, the integrity checker circuit aborts data transfer. In a method aspect, the method includes providing an integrity checker at an interface to an array of disk drives, and performing data validity determinations on data passing across the interface with the integrity checker, wherein invalid data is not transferred.Type: GrantFiled: September 25, 1997Date of Patent: March 14, 2000Assignee: International Business Machines CorporationInventors: Adalberto G. Yanes, James Richard Pollock, James C. Chen, David C. Giese
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Patent number: 5997569Abstract: Flexible probes are arranged to achieve a desired light distribution pattern for administering light therapy at a treatment site in a patient's body. The flexible probes (20, 20', 92) each include a flexible substrate on which are mounted light emitting devices (30) in spaced-apart array. An optically transparent, biocompatible envelope (36) encloses the flexible substrate and components mounted thereon. In one embodiment, a link (44) couples a pair of the flexible probes together in parallel alignment for insertion at the treatment site. Thereafter, the probes are moved relative to each other within the link to achieve the desired light distribution pattern. In another embodiment, the flexible probes include flexible leaders (70, 72) attached to their distal ends, which terminate in suture tabs (74) that can be affixed to tissue adjacent the treatment site.Type: GrantFiled: January 29, 1997Date of Patent: December 7, 1999Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, Brent Wiscombe
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Patent number: 5997842Abstract: Constructs including bars, capsules, beads, and sheets are configured with a radionuclide core that emits energetic particles activating a phosphorescent shell material surrounding the radionuclide core so that it emits light to administer light therapy or PDT. A biocompatible coating that is generally optically transparent encloses the radionuclide core and phosphorescent material to prevent a patient's body in which the constructs are disposed from being affected by any toxicity of the phosphorescent shell material. In a typical application of the constructs, a photoreactive agent is infused into the treatment site and selectively absorbed by abnormal tissue, for example, in a cancerous tumor. Light emitted by the phosphorescent material when activated by the energetic particles emitted from the radionuclide core administers photodynamic therapy, which destroys the abnormal tissue.Type: GrantFiled: April 13, 1998Date of Patent: December 7, 1999Assignee: Light Sciences Limited PartnershipInventor: James C. Chen
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Patent number: 5968182Abstract: A method and means within a hierarchical, demand/response DASD subsystem of the passive fault management type in which, upon the occurrence of fault, error, or erasure, a long device busy signal of finite duration is provided to a host CPU. Any DASD storage device subject to the anomaly is isolated from any host inquiry during this interval. These measures permit retry or other recovery procedures to be implemented transparent to the host and the executing application. This avoids premature declarations of faults, errors, or erasures and consequent host application aborts and other catastrophic measures. If the detected anomaly is not resolved within the allotted time, then other data recovery procedures can be invoked including device reset, the status reported to the host, and the next request processed.Type: GrantFiled: May 12, 1997Date of Patent: October 19, 1999Assignee: International Business Machines CorporationInventors: James C. Chen, Julia Liu, Chan Y. Ng, William G. Sherman, II
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Patent number: 5957960Abstract: A plurality of light sources that emit light having a long wavelength are energized for an extended period of time to increase the likelihood of two photon absorption by cells that have preferentially absorbed a photoreactive agent such as psoralen. The cells are preferably microscopic metastatic cancer cells that are diffusely distributed throughout a treatment site, for example, within an organ. The plurality of light sources are arranged in a spaced-apart array, mounted on a support plate that includes a plurality of conductive traces. A plurality of such arrays are preferably mounted to a flexible sheet that can conform to an outer surface of an organ being treated. Because the light emitted by the light sources is in the infrared or near infrared waveband, it penetrates deeply into the tissue at the treatment site.Type: GrantFiled: May 5, 1997Date of Patent: September 28, 1999Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, Brent Wiscombe
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Patent number: 5951691Abstract: The present invention provides a method and system for detecting corrupted data of a plurality of hard disk drives (HDDs) in a data storage subsystem. In this system a predetermined number of fixed blocks within each of the HDDs emulate a track of a first track format. The predetermined number of fixed blocks provide a logical track. The logical track of one of the plurality of HDDs is generated by the others of the plurality of HDDs. The plurality of logical tracks forming a plurality of track groups. In a first aspect the method and system comprises assigning each of the plurality of logical tracks an address translation (ADT) number, comparing each of the ADT numbers of the plurality of logical tracks to an expected value until a mismatch occurs in a logical track, and determining if other logical tracks in a same track group have accurate ADT numbers. The first aspect further includes reconstructing the logical track if the other tracks within the same track group have accurate ADT numbers.Type: GrantFiled: May 16, 1997Date of Patent: September 14, 1999Assignee: International Business Machines CorporationInventors: Chan Yiu Ng, James C. Chen, Charles Richard Lanzi
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Patent number: 5945762Abstract: An external power head is energized by a motor causing movement of an element that produces a varying magnetic field, thereby inducing power in an implanted receiver coil within a patient's body. The external power head includes either one or more moving permanent magnets, or one or more moving elements that vary the magnetic flux coupled to the implanted receiver coil. As a result of the varying magnetic field experienced by the implanted receiver coil, an electric current flows from the implanted receiver coil to energize an implanted medical device.Type: GrantFiled: February 10, 1998Date of Patent: August 31, 1999Assignee: Light Sciences Limited PartnershipInventors: James C. Chen, David J. Brown, Darrin Huston, Brian D. Wilkerson