Patents by Inventor Tsuguo Otsuki

Tsuguo Otsuki 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).

  • Patent number: 4320348
    Abstract: A variable level converter comprising a first variable level converting unit, a second variable level converting unit and an amplifying transistor connected therebetween. Each of the first and second variable level converting units comprises an inverted L-type variable attenuator which includes a variable impedance element. Each variable impedance element is controlled by the same level control signal and has the same electric characteristics.
    Type: Grant
    Filed: August 29, 1979
    Date of Patent: March 16, 1982
    Assignee: Fujitsu Limited
    Inventors: Shinjiro Suzuki, Tadashi Yoshikawa, Tsuguo Otsuki, Masao Takeda, Nobuhisa Kamoi, Kazuo Satoh