Patents by Inventor Sigeru Hashimoto

Sigeru Hashimoto 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).

  • Multi-layered optical film
    Patent number: 5460888
    Abstract: Alternating films consisting of alternations of high refractive index films and low refractive index films are provided on a transparent substrate such that the high refractive index film is adjacent to the substrate. The low refractive index films are composed of Al.sub.2 O.sub.3. The high refractive index films are composed of at least a component selected from a group consisting of TiO.sub.2, Ta.sub.2 O.sub.5, HfO.sub.2, ZrO.sub.2, Nb.sub.2 O.sub.5, mixture thereof and modified substances thereof.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: October 24, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Sigeru Hashimoto, Akihiko Yokoyama