Patents by Inventor Osamu Ishida

Osamu Ishida 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).

  • Patent number: 4220695
    Abstract: A leak-proof alkaline cell comprising a positive can and a negative electrode collector kept at the opening end of the positive can with intervention of a gasket so as to make the inside of the cell liquid-tight, characterized in that the gasket is made of an alkali resistant, elastic material and has a moisture content of not more than 0.3% by weight.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: September 2, 1980
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Osamu Ishida, Yoshio Uetani, Seiichi Matsushima