Patents by Inventor Souichi Yamashima

Souichi Yamashima 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).

  • Timing extraction circuit and communication system utilizing the same
    Patent number: 5237590
    Abstract: A timing clock extraction circuit for extracting from a multilevel code signal, transmitted at a predetermined baud rate, in which cross timings with a reference level are generated at frequency timings several times the baud rate, a clock pulse train at the baud rate and obtaining discriminative data from the multilevel code signal in accordance with the extracted clock pulse train.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: August 17, 1993
    Assignees: Hitachi, Ltd., Hitachi Communication Systems, Inc.
    Inventors: Tohru Kazawa, Toshiro Suzuki, Takashi Morita, Souichi Yamashima