Patents by Inventor David C. Davis

David C. Davis 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).

  • Publication number: 20130309656
    Abstract: A rapid test apparatus, system, and method of use utilizing lateral flow immunoassay (LFIA) detection of a selected ligand in a liquid sample from a body fluid such as saliva in a pet in which antibodies and their complimentary antigens are used with detection-nanoparticles to provide a visual or measurable end point indicator in which the method measures the exposure to viruses in the canine from Canine Parvovirus (CPV) and/or Canine Distemper virus (CDV).
    Type: Application
    Filed: May 17, 2012
    Publication date: November 21, 2013
    Inventor: David C. Davis
  • Publication number: 20080295774
    Abstract: A method for mass rearing of insects. A web including a plurality of wells is provided. Insect eggs or larvae and growth medium are loaded in the wells. The wells are covered. The web is rolled up. The eggs or larvae are incubated during eggs hatch and larval growth. The web is unrolled and the larvae harvested.
    Type: Application
    Filed: February 10, 2006
    Publication date: December 4, 2008
    Applicant: Chesapeake Perl, Inc.
    Inventors: Nikolai A. Van Beek, David C. Davis, Thomas A. Curran, Wayne C. Taylor
  • Publication number: 20080107578
    Abstract: A method for increasing the floccule size and volume of alumina trihydrate during the Bayer processing of bauxite ore using a flocculant in conjunction with a water continuous polymer. The addition of the flocculant and the water continuous polymer to the alumina trihydrate slurry following the security filtration and settling producing trihydrate that is put through the calcination process to produce purified alumina or used as seed for the precipitation process.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 8, 2008
    Inventors: Jing Wang, Kevin L. O'Brien, Michael G. Strominger, David C. Davis
  • Patent number: 7062578
    Abstract: A flexible, reconfigurable processing system architecture allows for the implementation of a variety of processing system configurations to be implemented on a single device, which is preferably a PCI bus add-in extension board with an attached daughter card attached and electrically connected thereto through a PCI Mezzanine type connector, and which is plugged into a personal computer PCI expansion slot. The architecture uses the PCI bus, for example, as the local CPU bus for an embedded processor, which not only allows for flexibility in system configuration but also allows PCI devices to be hidden from the host CPU to allow for proper system startup. The architecture further permits an embedded processing CPU to be re-booted when the secondary PCI bus host bus bridge fails to respond without affecting host CPU or other secondary PCI bus peripheral devices.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: June 13, 2006
    Assignee: Acuity Imaging, LLC
    Inventors: David C. Davies, Michael P. Greenberg, Michael J. Wilt, John E. Agapakis
  • Publication number: 20020019924
    Abstract: A flexible, reconfigurable processing system architecture allows for the implementation of a variety of processing system configurations to be implemented on a single device, which is preferably a PCI bus add-in extension board with an attached daughter card attached and electrically connected thereto through a PCI Mezzanine type connector, and which is plugged into a personal computer PCI expansion slot. The architecture uses the PCI bus, for example, as the local CPU bus for an embedded processor, which not only allows for flexibility in system configuration but also allows PCI devices to be hidden from the host CPU to allow for proper system startup. The architecture further permits an embedded processing CPU to be re-booted when the secondary PCI bus host bus bridge fails to respond without affecting host CPU or other secondary PCI bus peripheral devices.
    Type: Application
    Filed: October 15, 2001
    Publication date: February 14, 2002
    Applicant: Acuity Imaging, LLC
    Inventors: David C. Davies, Michael P. Greenberg, Michael J. Wilt, John E. Agapakis
  • Patent number: 6308234
    Abstract: A flexible, reconfigurable processing system architecture allows for the implementation of a variety of processing system configurations to be implemented on a single device, which is preferably a PCI bus add-in extension board with an attached daughter card attached and electrically connected thereto through a PCI Mezzanine type connector, and which is plugged into a personal computer PCI expansion slot. The architecture uses the PCI bus, for example, as the local CPU bus for an embedded processor, which not only allows for flexibility in system configuration but also allows PCI devices to be hidden from the host CPU to allow for proper system startup. The architecture further permits an embedded processing CPU to be re-booted when the secondary PCI bus host bus bridge fails to respond without affecting host CPU or other secondary PCI bus peripheral devices.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: October 23, 2001
    Assignee: Acuity Imaging, LLC
    Inventors: David C. Davies, Michael P. Greenberg, Michael J. Wilt, John E. Agapakis
  • Patent number: 5448904
    Abstract: An apparatus for calibrating an acoustic sensor. The apparatus includes a transmission material having an acoustic impedance approximately matching the acoustic impedance of the actual acoustic medium existing when the acoustic sensor is applied in actual in-service conditions. An elastic container holds the transmission material. A first sensor is coupled to the container at a first location on the container and a second sensor coupled to the container at a second location on the container, the second location being different from the first location. A sound producing device is coupled to the container and transmits acoustic signals inside the container.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: September 12, 1995
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Allan J. Zuckerwar, David C. Davis
  • Patent number: 5304939
    Abstract: A peak detector circuit employs a line receiver of the ECL type, with the analog input signal to be tracked as a receiver input. The other receiver input is connected to the circuit output. A capacitor connects the output node of the circuit to threshold reference voltage input. The capacitor is charged through a resistor from the output of the line receiver when the input signal exceeds the voltage on the output node, and the capacitor discharges to the reference input through this resistor and another resistor connecting the receiver output to the reference input. The output voltage tracks the peaks of the input signal. Oscillation of the receiver is avoided by using a threshold reference greater than zero. The dynamic range of the output can be extended to a level higher than that of ECL levels by summing the thresholds of a number of these detectors, using an operational amplifier.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: April 19, 1994
    Assignee: Digital Equipment Corporation
    Inventor: David C. Davies
  • Patent number: 5255287
    Abstract: Transceiver apparatus includes a transmitter circuit constructed with either emitter coupled logic (ECL) circuitry or programmable array logic circuitry, and a receiver circuit constructed with ECL circuitry. The transmitter circuit encodes a binary data signal received for transmission as a three-level modified duobinary encoded data signal and the receiver circuit decodes the received three-level encoded data signal to provide a binary data signal corresponding to the data signal received at the transmitter circuit for transmission. Both the transmitter and receiver circuits include features enabling transmitting and receiving high data-rate data signals.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: October 19, 1993
    Assignee: Digital Equipment Corporation
    Inventors: David C. Davies, Donald G. Vonada, Robert A. Curtis
  • Patent number: 5091159
    Abstract: In the Bayer process for producing alumina from bauxite of the type wherein the bauxite is added to a caustic solution to produce a soluble aluminate solution and an insoluble red mud fraction which is then subjected to one or more separation steps to produce a thickener overflow which is then subjected to a Kelly Filter Press to polish the thickener overflow the improvement which comprises treating the thickener overflow and the filter aid with a filtration improving amount of dextran.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: February 25, 1992
    Assignee: Nalco Chemical Company
    Inventors: Lawrence J. Connelly, Steven J. Abbatello, David C. Davis, David A. Undlin
  • Patent number: 4972161
    Abstract: In a serial data communications system, an embedded clock is recovered from a data signal by incrementally controlling the frequency (thus phase) of a voltage-controlled oscillator in response to the difference in phase between the incoming data signal and the clock oscillator output. A transition of the data signal is detected and used to initiate a control pulse which is terminated upon the next transition in the clock oscillator output. A reference pulse is also generated which has a width about equal to a half cycle of the clock. These pulses are used to generate the voltage control for the oscillator, so that the phase relationship varies to see an equilibrium where the pulses are of equal width and the transitions of the clock are at midpoint of potential transitions of the data signal. The control can tolerate relatively long periods where there is no transition of the data signal.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: November 20, 1990
    Assignee: Digital Equipment Corporation
    Inventors: David C. Davies, Donald G. Vonada
  • Patent number: 4891032
    Abstract: A flexible toy wand having a battery case at its lower end which also serves as the handle of the wand and a decorative lightable end piece at the tip of the wand. The wand is waved in a darkened area and various paths of light are created by the movement of the lighted end piece.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: January 2, 1990
    Inventor: David C. Davis
  • Patent number: 4737352
    Abstract: A method and composition for producing a more coarse alumina trihydrate crystal in a Bayer process pregnant liquor, involving the addition of approximately 5-400 mg/l of surfactant-oil, the oil dissolving the surfactant which can be selected from a host of surfactants which are stable in (hot) caustic solutions and capable of dispersing hydrophobic liquids in the Bayer liquor. The preferred embodiment involves the use of tall-oil fatty acids; a number of equivalent surfactants are established. The oil or hydrocarbon (hydrophobic) liquid can be selected from paraffinic oils, naphthenic oils, mineral seal oils, fuel oils, and bottoms or residue from a C.sub.10 alcohol distillation.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: April 12, 1988
    Assignee: Nalco Chemical Company
    Inventors: David O. Owen, David C. Davis
  • Patent number: 4644543
    Abstract: An apparatus and a method is disclosed for correcting on-line error corrections in the digital transmission of voice or data utilizing forward error correction technique which avoids on-line calculations of the Massey or Berlekamp algorithms and the Chien search that it entails, and permits a simple hardware apparatus comprised of a ROM, shift registers, and exclusive OR gates, thus eliminating the requirement of a dedicated massive computer.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: February 17, 1987
    Assignee: Honeywell Inc.
    Inventor: David C. Davis, Jr.
  • Patent number: 4145933
    Abstract: An indicator for recording the load at which a fatigue specimen breaks during the last cycle of a fatigue test. A load cell is attached to the specimen which is alternately subjected to tension and compression loads. The output of the load cell which is proportional to the load on the specimen is applied to the input of a peak detector. Each time that the specimen is subjected to a compression load, means are provided for appyling a positive voltage to the reset of the peak detector to reset it. Hence, during the last cycle of the tension load the peak detector measures the maximum load on the specimen. Means are also provided for disconnecting the load cell from the peak detector when there is a failure in the specimen.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: March 27, 1979
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Leland A. Imig, William T. Davis, David C. Davis
  • Patent number: 4075702
    Abstract: Several embodiments of an electronic calculating apparatus and wallet enclosure are described. The apparatus is provided with a side-located battery compartment for providing, in combination with the enclosure, a very convenient and useful, relatively thin assembly. The enclosure comprises two flap members. A first one of the flap members is adapted for supporting the apparatus. The other is adapted for folding over in facing relationship with the first. In each of the embodiments the first flap member is provided with an interior wall member. In one embodiment, the apparatus is separably inserted and supported in a pocket formed by the interior wall member. Keys which extend from the face of the apparatus for inserting numbers and the like project through keyholes provided in the interior wall member. In another embodiment, the apparatus is provided with engaging members which extend outwardly from the ends thereof.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: February 21, 1978
    Assignee: National Semiconductor Corporation
    Inventor: David C. Davies
  • Patent number: 4012625
    Abstract: An automatic printed circuit board tester to test printed circuit boards and diagnose faults in digital and analog electrical circuit networks is disclosed. The system is comprised of control, stimuli, and interconnection networks in combination with measuring instrumentation. For automated fault isolation, a moving probe assembly driven by stepping motors controlled by a minicomputer is utilized. The fault isolation system establishes a fault path from an output pin to a terminal point within the network. The location of the terminal point together with a directed graph is utilized to select branches that could cause the failure.
    Type: Grant
    Filed: September 5, 1975
    Date of Patent: March 15, 1977
    Assignee: Honeywell Information Systems, Inc.
    Inventors: Russell H. Bowen, Allen L. Clark, David C. Davis, Walter E. Gilbert, Wayne L. Glover, Richard J. Walsh, Robert G. Wehling