Patents by Inventor John H. Letcher

John H. Letcher 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).

  • Latched fedback memory finite-state-engine
    Patent number: 4786829
    Abstract: Disclosed herein is a simple latched-fedback-memory finite-state-engine that produces an inherently stable output upon the receipt of a clock signal, that is synchronously or asynchronously generated. The finite-state-engine comprises at least three latches and a function module, wherein the output of one latch is used as an input for the function module and a previous output of the function module is re-entered as an input into the function module.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: November 22, 1988
    Inventor: John H. Letcher