Patents by Inventor Yoshio Nakatogawa

Yoshio Nakatogawa 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).

  • Encapsulated reinforcement in moulded shaft
    Patent number: 4116575
    Abstract: A coupling shaft provided with a resilient member molded integrally therewithin during the molding process of the shaft and which is used to prevent a knob from loosening during service.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: September 26, 1978
    Assignee: Alps Electric Co., Ltd.
    Inventor: Yoshio Nakatogawa