Patents by Inventor Tomio Oyama

Tomio Oyama 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).

  • Speed control system for small size D-C electric motor
    Patent number: 4189666
    Abstract: A speed control system for a d-c electric motor comprising a three-terminal space control IC to provide a constant voltage source having a negative internal resistance equal in absolute value to the internal resistance of the motor and thereby render the motor rotatable at a constant controlled speed. A resistance element having a positive temperature coefficient is used as an external circuit element for the IC so that rotation speed variations relative to load torque variations will be substantially constant despite variations in the ambient temperature.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: February 19, 1980
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshio Tetsugu, Hiromitsu Nakano, Hiroshi Minakuchi, Tomio Oyama, Isao Yoshida, Mitsuharu Ota, Kazutsugu Kobayashi
  • Television receiver with zoom storage tube frame grabber with electronic inset into continuing received video stream
    Patent number: 3943280
    Abstract: In a television receiver, a video signal for a single frame at any moment is stored in a storage tube. The stored video signal is displayed, if necessary, as a still picture on a part of the picture tube screen together with the ordinary broadcasted television picture in motion.
    Type: Grant
    Filed: January 9, 1973
    Date of Patent: March 9, 1976
    Assignee: Matsushita Electric Industrial Company, Ltd.
    Inventors: Takeji Kimura, Iwajiro Sembokuya, Hideo Hozumi, Tomio Oyama
  • Ghost signal cancellation system
    Patent number: 3935536
    Abstract: A ghost signal cancellation system for cancelling ghost signals caused, for example, by reflection in a transmission line of television signals transmitted from a television transmitting station. This system is particularly suited for incorporation in a television receiver to improve the picture quality of a reproduced picture.
    Type: Grant
    Filed: March 14, 1973
    Date of Patent: January 27, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeji Kimura, Tomio Oyama, Haruyasu Yamada, Shuzi Harada, Hirokazu Yoshino, Eiichi Tsuboka