Patents by Inventor Tatsuo Ohtuka

Tatsuo Ohtuka 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).

  • Aluminum capacitor plate for electrolytic capacitor and process for making the same
    Patent number: 4763229
    Abstract: An aluminum capacitor plate for use in an electrolytic capacitor, the capacitor plate including a sponge-like layer in its surfacial portion, the layer including a plurality of projections projecting inward and outward, the projections individually having heights of not higher than 1 .mu.m on average; and a titanium film having accumulated titanium particles each including projections having heights of not higher than 1 .mu.m, wherein the titanium particles are unevenly distributed in the film with a number of pores interposed therebetween.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: August 9, 1988
    Assignee: Showa Aluminum Kabushiki Kaisha
    Inventors: Tatsuo Ohtuka, Shiuchi Murooka, Satoko Arai, Takeshi Nishizaki