Patents by Inventor Alfred John Jarvis

Alfred John Jarvis 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).

  • Data retention apparatus
    Patent number: 4049951
    Abstract: Apparatus for retaining the data held in a directional counter in the event of the voltage level supplied to the counter falling below a predetermined level comprises a directional counter means for comparing the level of voltage supplied to the directional counter with a predetermined voltage level, data storing means responsive to the comparator means for storing the output signal of the directional counter when the voltage falls below the predetermined voltage and for loading the stored output signal into the directional counter when the voltage level subsequently rises above the predetermined level.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: September 20, 1977
    Assignee: Decca Limited
    Inventors: Charlton Robert Baty, Alfred John Jarvis