Patents by Inventor Takashi Soga

Takashi Soga 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).

  • Demagnetizing apparatus for erasing signals recorded on concentric tracks
    Patent number: 4821127
    Abstract: A demagnitizing apparatus erases, track by track, wide-band and high-frequency recorded signals such as signals which are frequency-modulated (FM) with video signals, and thus eliminates the need for a relay to switch a single magnetic head between erasing capability and recording or reproducing capability.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: April 11, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Soga, Hitoshi Hirobe