Patents by Inventor Mitsutaka Yokoyama

Mitsutaka Yokoyama 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: 4039808
    Abstract: An N/P type silicon solar cell is doped with copper and encased in an aluminum sheath to form a probe. A heavy metal foil means is inserted in the probe to accomplish a solid state ionization chamber of silicon PN-junction type.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: August 2, 1977
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Ryuichi Tanaka, Satoshi Tajima, Akira Usami, Mitsutaka Yokoyama