Patents by Inventor Issei Takemoto

Issei Takemoto 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).

  • Patent number: 4273420
    Abstract: A liquid crystal display device using an alignment film of ladder-type organosilicone polymer or cross-linking product of cross-linkable ladder-type organosilicone polymer makes a homogeneous liquid crystal orientation, irrespectively of the kind of the liquid crystal used, never lowers its orientation ability even when fusion-sealing or sealing of the liquid crystal device is made with glass or thermosetting resin, and makes a clear display owing to the alignment film being colorless. The alignment film is insoluble in the liquid crystal used.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: June 16, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Watanabe, Ryoichi Sudo, Fusaji Shoji, Issei Takemoto, Hitoshi Yokono
  • Patent number: 4145369
    Abstract: Flame-retardant epoxy resin compositions comprising a polyepoxide, an acid anhydride curing agent, an imidazole curing accelerator, aluminum trihydrate powder and red phosphorus powder or red phosphorus powder coated by a thermo-setting resin have a lower viscosity and therefore show a longer pot life and better workability on casting as compared with prior art resin compositions. Also, a fly-back transformer coil produced by casting of said flame-retardant epoxy resin compositions is flame-retardant. Even if it burns slightly, no toxic gas is produced. Therefore, the coil has advantages in that a magnet wire is not corroded and voids are difficult to be formed and thereby partial discharge is difficult to occur, resulting in a long life and a stable output voltage.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: March 20, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Yasuo Hira, Ryoichi Sudo, Issei Takemoto, Tokio Isogai