Patents by Inventor Yoshiaki Ootuki

Yoshiaki Ootuki 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).

  • Control ball assembly for a coordinate input device
    Patent number: 5298916
    Abstract: A control ball assembly for a coordinate input device including a pair of orthogonal rotatable shafts contacting a control ball and which rotate in response to a rotation of the control ball. A spring having two arms, each arm connected to one end of one of the pair of shafts, presses the rotatable shafts inward against the control ball with an equal biasing force. A support member is provided to support the spring.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: March 29, 1994
    Assignee: Alps Electric Co., Ltd.
    Inventors: Tadamitsu Sato, Yoshiaki Ootuki, Shinji Hirano