Patents by Inventor Yasuo Numajiri

Yasuo Numajiri 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 isolator
    Patent number: 5267078
    Abstract: An optical isolator comprising an optical isolator unit having a structure depending on a plane of polarization of incident light, a first optical system for splitting the incident light into two polarized components for incidence on the optical isolator unit, and a second optical system for combining the two polarized components emerging from the optical isolator unit. The optical isolator can thus manifest an excellent effect of isolation without considering the plane of polarization of the incident light.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: November 30, 1993
    Assignees: Kazuo Shiraishi, Sumitomo Metal Mining Co., Ltd.
    Inventors: Kazuo Shiraishi, Kazuhiro Nakajima, Yasuo Numajiri