Patents by Inventor Yasutoshi Hara

Yasutoshi Hara 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).

  • Electrical capacitor
    Patent number: 4288837
    Abstract: An electrical capacitor comprising a capacitor element impregnated with a mixture of di-iso-propyl naphthalene and mono-iso-propyl naphthalene, the amount of which latter being 10% to 60% by weight, and preferably 20% to 40% by weight.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: September 8, 1981
    Inventors: Mineaki Nishimatsu, Sadayoshi Mukai, Yoshinori Hayashi, Osamu Yamaguchi, Akira Ito, Yasutoshi Hara