Patents by Inventor Tokujiro Kozawa

Tokujiro Kozawa 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: 4260222
    Abstract: A multi-layer non-reflecting film uniform in refractive index and having favorable optical characteristics which comprises at least one layer made of a mixture of Ta.sub.2 O.sub.5 and ZrO.sub.2 containing 5 to 25% of Ta.sub.2 O.sub.5.
    Type: Grant
    Filed: June 29, 1979
    Date of Patent: April 7, 1981
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Tokujiro Kozawa