Patents by Inventor Naohiro Ozaga

Naohiro Ozaga 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).

  • Thermal transfer printer
    Patent number: 4970531
    Abstract: A thermal transfer printer includes a mark disposed on an ink spool of an ink film cassette, reading device for reading the rotation of the ink spool by use of the mark, a calculation device for calculating the used quantity of ink film by use of the rotation data of the spool, and a display portion for displaying the remaining quantity of ink film obtained by the calculation device.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: November 13, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Horoshi Shimizu, Toshihiko Gotoh, Naohiro Ozaga, Takeshi Nomura, Kentaro Hanma, Mikio Shiraishi