Patents by Inventor Katsuo Tanmatsu

Katsuo Tanmatsu 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).

  • Scrambling system of television signal
    Patent number: 4618888
    Abstract: A scrambling system of television signal includes a circuit for eliminating vertical sync pulses in a vertical sync pulse period and equivalent pulses in first and second equivalent pulse periods at opposite ends of said vertical sync pulse period. In place of the eliminated pulses, substitute pulses having a frequency equal to an integer times the frequency of horizontal sync pulses are deposited. A framing code inserting circuit is provided for inserting at least one framing code in the substituted pulses. The framing code is carrying information how the television signal is scrambled.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: October 21, 1986
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazunori Nohara, Katsuo Tanmatsu, Nobukazu Hosoya, Takeshi Higashino