Patents by Inventor Masazi Yokota

Masazi Yokota 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).

  • Process for producing holograms
    Patent number: 4433893
    Abstract: A hologram having excellent durability and high diffraction efficiency and process for producing same is disclosed, wherein a glass hologram is subjected to a surface treatment with hydrofluoric acid.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: February 28, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masazi Yokota, Masaru Noguchi
  • Device for holding a film on a focal plane
    Patent number: 4363538
    Abstract: A photographic film like a microfilm is maintained on a focal plane by suction. A film support having a vacuum suction holes is made of a drafty material to allow draft while the film is maintained flat on the surface thereof by suction. Further, the film support has cushion to protect the film from scratches. Thus, the film can be fed on while being kept flat on a focal plane on the film support.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: December 14, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masazi Yokota, Shigenori Oosaka