Patents by Inventor Richard C. Liu

Richard C. Liu 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).

  • System and method for ensuring that the results of machine learning models can be audited
    Patent number: 11948051
    Abstract: In one embodiment, a method for auditing the results of a machine learning model includes: retrieving a set of state estimates for original time series data values from a database under audit; reversing the state estimation computation for each of the state estimates to produce reconstituted time series data values for each of the state estimates; retrieving the original time series data values from the database under audit; comparing the original time series data values pairwise with the reconstituted time series data values to determine whether the original time series and reconstituted time series match; and generating a signal that the database under audit (i) has not been modified where the original time series and reconstituted time series match, and (ii) has been modified where the original time series and reconstituted time series do not match.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: April 2, 2024
    Assignee: ORACLE INTERNATIONAL CORPORATION
    Inventors: Edward R. Wetherbee, Kenneth P. Baclawski, Guang C. Wang, Kenny C. Gross, Anna Chystiakova, Dieter Gawlick, Zhen Hua Liu, Richard Paul Sonderegger
  • Set-top box having an improved patch antenna
    Patent number: 7071883
    Abstract: A set top box is provided with a patch antenna to wirelessly communicate with other devices. In one embodiment, the set top box has a metallic enclosure with a non-metallic bezel covering the front of the device. A communication circuit board with an imprinted patch antenna is located in the interstitial space between the metallic enclosure and the non-metallic bezel. The communications board preferably comprises a thin (0.06 inch) FR-4 circuit board with etched copper cladding. The patch antenna preferably comprises a ground plane on one side of the circuit board, and a rectangular patch on the opposite side of the circuit board. The patch is side-fed by a microstrip feed. The dimensions of the antenna are selected to optimize the antennas performance in frequency range between 2.400 and 2.483 GHz when located in the above-described interstitial space.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: July 4, 2006
    Assignee: Eagle Broadband, Inc.
    Inventors: H. Dean Cubley, Richard C. Liu
  • Set-top box having an improved patch antenna
    Publication number: 20030028902
    Abstract: A set top box is provided with a patch antenna to wirelessly communicate with other devices. In one embodiment, the set top box has a metallic enclosure with a non-metallic bezel covering the front of the device. A communication circuit board with an imprinted patch antenna is located in the interstitial space between the metallic enclosure and the non-metallic bezel. The communications board preferably comprises a thin (0.06 inch) FR-4 circuit board with etched copper cladding. The patch antenna preferably comprises a ground plane on one side of the circuit board, and a rectangular patch on the opposite side of the circuit board. The patch is side-fed by a microstrip feed. The dimensions of the antenna are selected to optimize the antennas performance in frequency range between 2.400 and 2.483 GHz when located in the above-described interstitial space.
    Type: Application
    Filed: July 11, 2001
    Publication date: February 6, 2003
    Inventors: H. Dean Cubley, Richard C. Liu