Patents by Inventor Tsuguhiro Okada

Tsuguhiro Okada 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).

  • Digital frequency comparator circuit
    Patent number: 3987365
    Abstract: A digital frequency comparator circuit comprising two counters connected to a circuit to be driven, in which one of the two counters which earlier issues an output signal is temporarily held, and both the counters are not cleared until the other counter subsequently issues an output signal, whereby an instability in the operation of the circuit to be driven is eliminated.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: October 19, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Tsuguhiro Okada, Akira Endo