Patents by Inventor Shuichi Otake

Shuichi Otake 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).

  • Power semiconductor device with O-ring seal
    Patent number: 4609937
    Abstract: A power semiconductor device dispensed with soldering and useful for fork lifts and etc., wherein at least one O-ring is provided between the inner wall of case housing at least one semiconductor element structure and outer periphery of a member disposed on the semiconductor element structure inside said case so as to hermetically seal the semiconductor element structure from external atmosphere.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: September 2, 1986
    Inventors: Minami Takeuchi, Shuichi Otake