Patents by Inventor Shigehisa Hagura

Shigehisa Hagura 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).

  • Portable teaching apparatus
    Patent number: 5115179
    Abstract: A portable teaching apparatus comprises interlock cancellation switches and at least one operating switch for producing a signal which remains effective only when the interlock cancellation switch is depressed. A box-like body with the operating switch arranged on the front surface thereof include two parallel strips of apexes on the back side thereof. Slopes which steadily approach the front side and continued from the apexes are formed between the two strips of apexes. The operating buttons of the interlock cancellation switches are mounted on the slopes respectively.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: May 19, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Kenjiro Fujii, Masao Oura, Kazuyuki Tuburaya, Shigehisa Hagura
  • Liquid crystal video projector
    Patent number: D436979
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: January 30, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Yoshimasa Yokoyama, Atsutoshi Sato, Shigehisa Hagura, Shinji Matsumoto, Munenori Ikeda, Mikiharu Kuwata
  • Screw driver
    Patent number: D325857
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: May 5, 1992
    Assignee: Hitachi Koki Company, Limited
    Inventors: Hideaki Hasegawa, Fumio Tashimo, Shigehisa Hagura, Kazuyuki Tuburaya
  • Electric screw driver
    Patent number: D326043
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: May 12, 1992
    Assignee: Hitachi Koki Company, Limited
    Inventors: Hideaki Hasegawa, Fumio Tashimo, Shigehisa Hagura, Kazuyuki Tuburaya, Masaru Oda
  • Frequency inverter
    Patent number: D343382
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: January 18, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Shigehisa Hagura, Toshihiko Wada, Tadao Shimotsu, Norinaga Suzuki
  • Liquid crystal video projector
    Patent number: D419581
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: January 25, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Ishibashi, Shigehisa Hagura, Seiichi Sekiguchi, Shinji Matsumoto, Yuichi Sugawara
  • Liquid crystal video projector
    Patent number: D429270
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: August 8, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Ishibashi, Shigehisa Hagura, Seiichi Sekiguchi, Shinji Matsumoto, Yuichi Sugawara