Patents by Inventor Akinobu Ohtani

Akinobu Ohtani 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).

  • External operation device for electronic timepieces
    Patent number: 4259551
    Abstract: An external operation device for electronic timepieces having a switch unit made up of an array of a plurality of electric switches is inserted in an external member of a timepiece and said electric switches being electrically connected to an internal module.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: March 31, 1981
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Akinobu Ohtani, Hideo Hatanaka, Motoyuki Saito