Patents by Inventor Tokuo Maekawa

Tokuo Maekawa 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).

  • Photographic film package and method of making the same
    Patent number: 4972649
    Abstract: A lens-fitted photographic film package comprising a light-tight film casing having an exposure opening, a rolled film disposed on one side of the exposure opening in the light-tight casing, a removable light-tight container having a film winding spool therein disposed on the other side of the exposure opening in the light-tight film casing, and an externally operable film winding member for winding the rolled film around said film winding spool of the light-tight film container. The lens-fitted photographic film package is assembled by the steps of winding film withdrawn from a light-tight film container in a roll in a darkroom; loading the rolled film and the light-tight film container in separate respective receiving chambers formed in a main body section of the lens-fitted photographic film package; and fixing a back cover section to the main body section so as to assemble light-tightly the lens-fitted photographic film package.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: November 27, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsuyoshi Mochida, Tokuo Maekawa, Hisashi Takei, Yasuo Matsumoto, Hiroshi Ohmura, Shigeru Sugimoto, Seimei Ushiro, Seiji Asano, Toshio Yoshida
  • Photographic film package and method of making the same
    Patent number: 4954857
    Abstract: A lens-fitted photographic film package comprising a light-tight film casing having an exposure opening, a rolled film disposed on one side of the exposure opening in the light-tight casing, a removable light-tight container having a film winding spool therein disposed on the other side of the exposure opening in the light-tight film casing, and an externally operable film winding member for winding the rolled film around said film winding spool of the light-tight film container. The lens-fitted photographic film package is assembled by the steps of winding film withdrawn from a light-tight film container in a roll in a darkroom; loading the rolled film and the light-tight film container in separate respective receiving chambers formed in a main body section of the lens-fitted photographic film package; and fixing a back cover section to the main body section so as to assemble light-tightly the lens-fitted photographic film package.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: September 4, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsuyoshi Mochida, Tokuo Maekawa, Hisashi Takei, Yasuo Matsumoto, Hiroshi Ohmura, Shigeru Sugimoto, Seimei Ushiro, Seiji Asano, Toshio Yoshida
  • Photographic film package and method of making the same
    Patent number: 4884087
    Abstract: A lens-fitted photographic film package comprising a light-tight film casing having an exposure opening, a rolled film disposed on one side of the exposure opening in the light-tight casing, a removable light-tight container having a film winding spool therein disposed on the other side of the exposure opening in the light-tight film casing, and an externally operable film winding member for winding the rolled film around said film winding spool of the light-tight film container. The lens-fitted photographic film package is assembled by the steps of winding film withdrawn from a light-tight film container in a roll in a darkroom; loading the rolled film and the light-tight film container in separate respective receiving chambers formed in a main body section of the lens-fitted photographic film package; and fixing a back cover section to the main body section so as to assemble light-tightly the lens-fitted photographic film package.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: November 28, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsuyoshi Mochida, Tokuo Maekawa, Hisashi Takei, Yasuo Matsumoto, Hiroshi Ohmura, Shigeru Sugimoto, Seimei Ushiro, Seiji Asano, Toshio Yoshida