Patents by Inventor Takao Ohira

Takao Ohira 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 tape recorder
    Patent number: 4511934
    Abstract: A video tape recorder includes a rotary magnetic head drum having a rotating member and a magnetic head mounted on the rotating member, a laser element mounted on the rotating member, a current source for supplying a constant current to the laser element, a circuit for electrically connecting a coil of the magnetic head in parallel with the laser element, a photoelectric conversion member fixed in the video tape recorder, and members for optically coupling the laser element with the photoelectric conversion member.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: April 16, 1985
    Assignee: Sony Corporation
    Inventors: Takao Ohira, Daijiro Okihara, Makoto Niiro