Patents by Inventor David O. Feder

David O. Feder 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).

  • Low float technology battery
    Patent number: 4931367
    Abstract: In a device for providing stand-by power to an electrical apparatus, such as a telephone switching system, the battery contained therein is maintained at a positive plate polarization of about 20 to 40 millivolts per cell.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: June 5, 1990
    Assignee: C & D Charter Power Systems, Inc.
    Inventors: William B. Brecht, David O. Feder, Joseph M. McAndrews, Allan J. Williamson