Patents by Inventor Nobutoshi Mizusawa

Nobutoshi Mizusawa 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).

  • Optical device
    Patent number: 4685766
    Abstract: An optical device comprises an optical waveguide constituted of as a basic unit a core layer of a material having a relatively high refractive index and a clad layer of a material having a relatively low refractive index and covering said core layer, and heating means for heating said core layer to change the refractive index thereof, characterized in that when said core layer is constituted of a liquid, said core layer is heated by said heating means to a temperature such that said core layer does not boil.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: August 11, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukuo Nishimura, Eigo Kawakami, Toshiaki Asano, Masahiro Haruta, Hiroshi Takagi, Takashi Noma, Nobutoshi Mizusawa, Mitsunobu Nakazawa, Kunitaka Ozawa
  • Recording apparatus with a carriage-mounted ink tank and overflow tank
    Patent number: 4677448
    Abstract: A recording apparatus comprising a first ink tank mounted on a carriage, a second ink tank which remains disconnected from the first tank during recording, means for intermittently forming an ink supply path extending between the first and second ink tanks when ink is to be supplied to the first tank from the second tank, and means for maintaining constant the amount of ink within the first ink tank.
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: June 30, 1987
    Assignee: Canon Kabushiiki Kaisha
    Inventors: Nobutoshi Mizusawa, Noboru Koumura
  • Optical display utilizing thermally formed bubble in a liquid core waveguide
    Patent number: 4640592
    Abstract: An optical device comprises an optical waveguide having, as a basic unit, a core layer of a liquid having a relatively high refractive index and a clad layer having a relatively low refractive index and covering said core layer, and a heat-generating means for heating a part of said core layer to form a vapor bubble in said liquid of said core layer.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: February 3, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukuo Nishimura, Toshiaki Asano, Nobutoshi Mizusawa, Eigo Kawakami, Masahiro Haruta, Takashi Noma, Hiroshi Takagi, Mitsunobu Nakazawa, Kunitaka Ozawa