Patents by Inventor C. Cheng

C. Cheng 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).

  • Patent number: 6362992
    Abstract: A binary-ternary configurable content addressable memory (CAM) (100). A plurality of CAM cells (114) including comparator logic cells (116) and paired storage locations (118, 118a, 118b) are directed by a signal at a mode terminal (120) to compare data provided at an input bus (110), either in binary mode against pre-stored content data or in ternary mode against pre-stored content and mask data. The comparator logic cells (116) generate respective bit signals (122) based on such comparison, and in this manner the plurality of CAM cells (114) may collectively be part of a CAM array block (104), which may optionally in turn work with a match detection block (106) to generate a match signal (126), and which may optionally in turn work with a priority encoder block (108) to generate a result signal at a result output (112).
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: March 26, 2002
    Assignee: Purple Ray, Inc.
    Inventor: Paul C. Cheng
  • Publication number: 20020032865
    Abstract: A server/overlay network architecture and related method prevent (i.e., minimize the likelihood of) overloads from many network clients all trying to upload data files to a common destination server on the network at about the same time. Before a client transfers its (his or her) data file to the common network destination, a unique identifier (generally much smaller than the data itself) for the data of that client is generated. The unique identifier, such as a one-way hash function, is transmitted to an authenticator trusted by the common destination. The authenticator time-stamps (i.e., stores time and date) the unique identifier, digitally signs a message incorporating the unique identifier and the time-stamp and sends the message to the client who sent the unique identifier. The client then sends the data file with its time stamp to one of a plurality of upload proxy servers. The proxy server sends a message to the common destination telling it to pick up the data file when ready.
    Type: Application
    Filed: March 28, 2001
    Publication date: March 14, 2002
    Inventors: Leana Golubchik, William C. Cheng, Samir Khuller, Samrat Bhattacharjee, Cheng-Fu Chou
  • Publication number: 20020007247
    Abstract: Structural and stratigraphic discontinuities are identified in a 3-D volume of seismic data samples in the presence of reflection dip, by first selecting a primary and at least one secondary direction in the volume of seismic data samples. Next, skeleton patches are identified in the volume of seismic data samples, where the skeleton patches comprise groups of connected seismic samples representing seismic horizons in the volume of seismic data samples. Apparent dip is calculated in the primary and secondary directions at each data sample within the identified skeleton patches, creating a primary and secondary direction dip volumes, respectively, at corresponding data sample locations. A filter is applied to the primary direction dip and secondary direction dip volumes to fill in values at the data sample locations not within the identified skeleton patches.
    Type: Application
    Filed: June 26, 2001
    Publication date: January 17, 2002
    Inventors: Yao C. Cheng, Lee H. Fairchild, John A. Farre, Steve R. May
  • Publication number: 20020003192
    Abstract: A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.
    Type: Application
    Filed: February 13, 2001
    Publication date: January 10, 2002
    Applicant: Hughes Electronics Corporation
    Inventors: Frank Taormina, Donald C.D. Chang, Kar W. Yung, David C. Cheng, William W. Mayfield, John Novak, Arthur W. Wang
  • Patent number: 6336612
    Abstract: A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: January 8, 2002
    Assignee: Hughes Electronics Corporation
    Inventors: Frank Taormina, Donald C.D. Chang, Kar W. Yung, David C. Cheng, William W. Mayfield, John Novak, III, Arthur W. Wang
  • Patent number: 6327872
    Abstract: The present invention provides a method and apparatus for producing a pressurized high purity liquid carbon dioxide stream in which a feed stream composed of carbon dioxide vapor is purified within a purifying filter and then condensed within a condenser. The result liquid is then alternately introduced and dispensed from two first and second pressure accumulation chambers. The first and second pressure accumulation chambers are heated by electrical heaters to pressurize the liquid to the required or desired delivery pressure of the pressurized liquid carbon dioxide stream. Such stream is alternately extracted from the first and second pressure accumulation chambers on a continuous basis in which one of the first and second pressure accumulation chambers acts in a dispensing role while the other is being filled. The pressurized liquid carbon dioxide stream can be further filtered within a particulate filter.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: December 11, 2001
    Assignee: The BOC Group, Inc.
    Inventors: Robert Walter Boyd, Jessi Lynn Pike, David C. Cheng, Kelly Leitch
  • Patent number: 6313790
    Abstract: A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: November 6, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Donald C. D. Chang, Kar W. Yung, William J. Nunan, David C. Cheng, Bruce E. Shuman
  • Patent number: 6312679
    Abstract: Starburst conjugates which are composed of at least one dendrimer in association with at least one unit of a carried agricultural, pharmaceutical, or other material have been prepared. These conjugates have particularly advantageous properties due to the unique characteristics of the dendrimer.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 6, 2001
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Donald A. Kaplan, William J. Kruper, Jr., Roberta C. Cheng, Ian A. Tomlinson, Michael J. Fazio, David M. Hedstrand, Larry R. Wilson
  • Publication number: 20010037097
    Abstract: A urine management system for human females comprising a novel collection device, a novel conveyance tube, and a novel storage container is described. The collection device is worn by the user in direct contact with the skin surfaces surrounding the urethral opening being held in place by an undergarment. The collector comprises a thin layer of pliable and water-permeable material through which leaked or voided urine passes and that is underlain by a layer of water-wicking material which may also contain one or more open channels for directing and conveying the flow of urine to a fitting connection with the conveyance tube. The conveyance tube, a novel thin-wall, flat tube, contains a spacer throughout its length to prevent the tube lumen from being completely closed and sealed off by kinks or twists in the tube. The tube can conform to the body shape of the wearer, expands as flow rate increases, and shrinks and flattens as flow drops off.
    Type: Application
    Filed: April 5, 2001
    Publication date: November 1, 2001
    Inventors: Gordon C. Cheng, James R. Valentine
  • Patent number: 6303799
    Abstract: Novel aryl derivatives comprising an aryl olefin moiety linked to a non-nucleosidic backbone moiety are disclosed. The resulting molecules are typically used as photoactivated crosslinking groups when incorporated into oligonucleotides to crosslink nucleic acid strands.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: October 16, 2001
    Assignee: Naxcor
    Inventors: Peter C. Cheng, David Albagli, Michael L. Wood
  • Patent number: 6294367
    Abstract: Thermostable peptidase enzyme derived from archaeon from the genus Pyrococcus is disclosed. The enzyme is produced from native or recombinant host cells and can be utilized in the biotechnology industry as a useful enzyme in sequencing reactions.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: September 25, 2001
    Assignee: California Institute of Technology
    Inventors: Timothy C. Cheng, Vij Ramakrishnan, Sunney I. Chan
  • Patent number: 6288866
    Abstract: A disk drive including a head disk assembly, a planar printed circuit board and a vibration damping system. The vibration damping system is fixed adjacent the outer surface of the printed circuit board and includes an external planar member of compressible foam composition and a substantially-planar rigid mass damper of like shape and extent and arranged so that the external planar member contacts both the outer surface of the printed circuit board and the upper major surface of the mass damper. The major surfaces of the mass damper include upwardly-convex bosses for receiving fastening screws to maintain a predetermined separation distance between the printed circuit board and the mass damper that is somewhat less than the unconstrained thickness of the external planar member of compressible foam composition.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: September 11, 2001
    Assignee: Western Digital Technologies, Inc.
    Inventors: Walter W. Butler, Chunjer C. Cheng
  • Patent number: 6277570
    Abstract: Methods and compositions are provided for detecting nucleic acid sequences. Probes comprising a crosslinking agent are combined with a sample which may comprise a target sequence which is complementary to the probe. Hybridization is allowed to occur between complementary sequences. The crosslinking agent is activated. Covalent bonds are formed between the probe and the target sequence if they are hybridized to one another. The crosslinked nucleic acids can then be detected to indicate the presence of the target sequence. Also provided are kits comprising reagents.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: August 21, 2001
    Assignee: Naxcor
    Inventors: Michael L. Wood, David Albagli, Reuel B. Van Atta, Peter C. Cheng, Bingfang Huan, Douglas Y. Thien
  • Patent number: 6272412
    Abstract: An impact system employs an accelerometer (40), which produces an acceleration signal (70), and communicates it with a restraints control module (38) that, in turn, determines when switches (58) for passive restraint actuation will be activated. The restraints control module (38) decomposes the acceleration signal (70) via low (44) and high (46) pass filters into a high frequency signal (74), which is used for impact mode determination (78), and a low frequency signal (76), which is used for impact severity determination (80). The results of the two determinations are then used to make a deployment decision (82) for one or more of the passive restraints (30, 32, 34) in the vehicle (20).
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: August 7, 2001
    Assignee: Ford Global Technologies, Inc.
    Inventors: Chi-Chin Wu, James C. Cheng, Jialiang Le, Mark Anthony Cuddihy
  • Patent number: 6266898
    Abstract: A structure for ventilating a toe region of a shoe includes a body including in its heel zone two major walls and a resilient element having a multitude of voids arranged in a pumping chamber to urge the two walls apart against the action of external forces tending to draw air into the chamber. The resilient element includes a plurality of substantially dome-shaped hollow protuberances bounding respective first and second voids within and outside of them, respectively, and connecting portions that interconnect the protuberances. Respective connecting channels are provided in the connecting portions and in respective adjacent regions of the protuberances to establish communication between the first voids. A corrugated insert within the body aids ventilation and shock absorption. An extension on the body optimizes air transfer.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: July 31, 2001
    Inventor: Peter S. C. Cheng
  • Publication number: 20010009405
    Abstract: A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements.
    Type: Application
    Filed: February 9, 2001
    Publication date: July 26, 2001
    Applicant: Hughes Electronics Corporation
    Inventors: Donald C.D. Chang, Kar W. Yung, William J. Nunan, David C. Cheng, Bruce E. Shuman
  • Patent number: 6257526
    Abstract: A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: July 10, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Frank Taormina, Donald C. D. Chang, Kar W. Yung, David C. Cheng, William W. Mayfield, John Novak, III, Arthur W. Wang
  • Patent number: 6256746
    Abstract: A system and method for detecting multiple inputs, e.g., the asynchronous transition of a pin input or a synchronous input from the CPU, and enables either of the inputs to generate a wake up signal using a single clock signal. The invention also resolves conflicts between the multiple inputs while using the single clock signal.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: July 3, 2001
    Assignee: Ubicom, Inc.
    Inventor: Chuck C. Cheng
  • Patent number: 6246363
    Abstract: A method and system for using two-way ranging navigation to accurately determine the range along the path from source to destination by measuring the time delay during round-trip communication via satellite. The two-way ranging navigation measurements are used as calibration references, thereby improving the positioning accuracy of GPS. The system includes GPS and a two-way ranging navigation system for taking position measurements of a target. A correction factor is determined as a function of the measurements and the GPS position is adjusted by the correction factor. The method for calibrating GPS using two-way ranging navigation involves taking a two-way ranging navigation measurement and a GPS measurement of a target, determining a correction factor as a function of the measurements, and correcting the GPS position by taking a second GPS measurement and adjusting it by the correction factor.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: June 12, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Kar W. Yung, David C. Cheng, Donald C. D. Chang
  • Bow
    Patent number: D445065
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: July 17, 2001
    Inventor: Peter S. C. Cheng