Patents by Inventor Chihiro Ohtsuki

Chihiro Ohtsuki 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).

  • Small impact printer with hammer mask
    Patent number: 4402261
    Abstract: A printer mask has spaced openings to allow impact therethrough of a hammer against characters arranged in circular columns along a character drum. The distance between the characters and mask changes automatically to compensate for changes in ambient temperature by using mounting materials of selected thermal coefficients of expansion. Uniform printing quality without marring the print paper is achieved with this mask construction.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: September 6, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Chihiro Ohtsuki, Hitoshi Mikoshiba