Patents by Inventor Seiji Fijisawa

Seiji Fijisawa 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).

  • Brightness and contrast control for television receiver
    Patent number: 4005262
    Abstract: A television receiver having a picture control circuit permitting simultaneous control of both brightness and contrast and means for controlling contrast alone without varying brightness so that the character of the reproduced picture may be controlled to suit a viewer's taste.
    Type: Grant
    Filed: July 21, 1975
    Date of Patent: January 25, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seiji Fijisawa, Norio Meki, Hiroyuki Irie