Patents by Inventor Makoko Harigaya

Makoko Harigaya 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).

  • Method of manufacturing masked semiconductor laser
    Patent number: 4855256
    Abstract: A masking layer is formed on the light-emitting mirror surface of a semiconductor laser body. The masking layer is capable of blocking light emitted from the semiconductor laser body and of being thermally melted and evaporated by exposure to the emitted light. When the masking layer is formed on the light-emitting mirror surface of the semiconductor laser body, a small light-emitting hole is defined in the masking layer by the heat of the emitted light which is effective to prevent the material of the masking layer from being evaporated on a portion of the light-emitting surface.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: August 8, 1989
    Assignees: Ricoh Company, Ltd., Hiroshi Kobayashi, Haruhiko Machida
    Inventors: Hiroshi Kobayashi, Haruhiko Machida, Makoko Harigaya, Yasushi Ide, Jun Akedo