Patents by Inventor Susumo Ito

Susumo Ito 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).

  • Magnetooptical recording medium with laminated anti-reflection film
    Patent number: 4637953
    Abstract: A magnetooptical recording medium is provided which comprises (a) a light-transmissive substrate formed of a material selected from the group consisting of plastic and glass, (b) a multilayer film disposed on said light-transmissive substrate, and multilayer film being formed by alternate lamination in three or more odd number of a high-refractive film composed of a high-refractive material and a low-refractive film containing SiO.sub.2 as the main constituent and the film in contact with said light-transmissive substrate being a high refractive film, and (c) a recording magnetic layer disposed on said multilayer film, recording on said magnetic film being performed by a light beam transmitting said substrate and said multilayer.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: January 20, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsuharu Sawamura, Susumo Ito