Patents by Inventor Yoshihiro Kaizawa

Yoshihiro Kaizawa 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).

  • Automatic polarization analyzing device
    Patent number: 3988067
    Abstract: In an automatic polarization analyzing device which employs the extinction detecting method using a light amplitude modulating system, two sets of converter means are provided for converting into an angle a positional deviation electrical signal corresponding to a dead zone present in the control system.
    Type: Grant
    Filed: February 4, 1975
    Date of Patent: October 26, 1976
    Assignee: Nippon Kogaku K.K.
    Inventors: Tadaaki Yamamoto, Toshiyuki Kasai, Yoshihiro Kaizawa, Sakuji Watanabe