Patents by Inventor Hikoharu Hara

Hikoharu Hara 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).

  • Method of forming photographic line and half-tone images
    Patent number: 4113489
    Abstract: High-contrast photographic images are obtained by developing with a developer containing at least one dihydroxybenzene and sulfite ion and then treating with a solution of an oxidizing agent.
    Type: Grant
    Filed: March 1, 1972
    Date of Patent: September 12, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Sugiyama, Shoji Ishiguro, Nobuo Sugiyama, Yoo Iijima, Eiichi Okutsu, Haruhiko Iwano, Katsumi Hosoya, Hikoharu Hara