Patents by Inventor Yoshiharu Yamashiro

Yoshiharu Yamashiro 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).

  • Tablet for use in a coordinate digitizer
    Patent number: 3974332
    Abstract: A capacitively coupled tablet for use with an electrically conductive pen comprises segments each including at least one lattice point of a matrix which comprises groups of spaced conductors which are disposed along coordinate axes. The segments are mutually electrically isolated by an electrically conductive shield layer having apertures which correspond to the surface area of the respective segments, and are marked with corresponding characters to serve as keys. An electrically insulating layer is disposed between the shield layer and the groups of conductors, and a similar surface layer is disposed on the shield layer.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: August 10, 1976
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Kiyomi Abe, Yoshio Shishido, Genichi Tagata, Tadaaki Sugino, Yoshiharu Yamashiro