Patents by Inventor Akira Shimpo

Akira Shimpo 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).

  • Optical recording medium
    Patent number: 5155008
    Abstract: An optical recording medium having a recording layer containing a particular cyanine dye matter and a particular quencher. The material of the recording medium can be directly applied to the injection-molded substrate without any damage to the substrate. The productivity of this recording medium is therefore high. This medium also has superior recording/reproduction characteristics.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: October 13, 1992
    Assignee: Pioneer Electronic Corporation
    Inventors: Shuichi Yanagisawa, Tatsuro Sakai, Fumio Matsui, Tsuneki Okazaki, Akira Shimpo