Patents by Inventor Hamza W. Derbas

Hamza W. Derbas 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).

  • Capacitance pre-charging
    Patent number: 11190008
    Abstract: A high-voltage DC floating system includes a source, a power rail, a power bus, a load, and a pre-charge circuit. The power bus includes a positive bus portion and a negative bus portion. The pre-charge circuit includes a first pre-charge circuit portion that is configured to equalize a voltage across the positive power supply switch between the source and a Y-capacitance of the load and a second pre-charge circuit portion that defines a switched path to ground that is configured to equalize a voltage associated with a Y-capacitance of the negative power rail.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: November 30, 2021
    Assignee: Apple Inc.
    Inventors: Hunter Wu, Hamza W. Derbas, Paul Firehammer, Robert J. Kromer
  • Battery Preconditioning for Charging
    Publication number: 20210143649
    Abstract: A method includes pre-conditioning a battery for charging to support higher rates of charging the battery.
    Type: Application
    Filed: January 18, 2021
    Publication date: May 13, 2021
    Inventors: Michael A. Sherback, Hamza W. Derbas, Jeremy S. Neubauer
  • Battery preconditioning for charging
    Patent number: 10931124
    Abstract: A method includes pre-conditioning a battery for charging to support higher rates of charging the battery.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 23, 2021
    Inventors: Michael A. Sherback, Hamza W. Derbas, Jeremy S. Neubauer
  • Battery Preconditioning for Charging
    Publication number: 20190157882
    Abstract: A method includes pre-conditioning a battery for charging to support higher rates of charging the battery.
    Type: Application
    Filed: June 30, 2017
    Publication date: May 23, 2019
    Inventors: Michael A. Sherback, Hamza W. Derbas, Jeremy S. Neubauer