Patents by Inventor Haruo Shimoyama

Haruo Shimoyama 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).

  • Video/audio simultaneous transmission system
    Patent number: 4542406
    Abstract: The horizontal sync signal contained in the video signal from a video apparatus sometimes undergoes phase jump, resulting in failure of multiplexing of audio and video signals based on the horizontal sync signal. A sync signal switching circuit is adapted to produce a modified sync signal by switching the sync signal to a local sync signal upon occurrence of the phase jump, thereby assuring the multiplexing of audio and video signals.
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: September 17, 1985
    Assignees: Nippon Electric Co., Ltd., Nippon Telegraph & Telephone Public Corporation, Fujitsu Limited
    Inventors: Haruo Shimoyama, Toshio Ohshima, Shinobu Nomoto, Makoto Hiraoka, Toshio Hanabata