Patents by Inventor Koichi Tabuchi

Koichi Tabuchi 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).

  • Apparatus and method for recording and reproducing information signals
    Patent number: 4926273
    Abstract: Magnetic recording and reproducing apparatus including a rotary head drum and power system. The rotary head drum includes at least a rotary head and preamplifier mounted therein. A rotary transformer communicates information signals to/from the rotary head drum and also transmits high-frequency powers signals for operating the pre-amplifer. The transmission occurs at time periods during which recording and reproducing action cannot be performed.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: May 15, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichi Tabuchi, Shigeo Kizu