Patents by Inventor Kiyoshi Kinugawa

Kiyoshi Kinugawa 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).

  • Heat roll for electrophotography
    Patent number: 4888464
    Abstract: A heat roll for electrophotography of a surface heating type having a heating resistor is arranged such that a bonding layer, an insulating layer, a resistance layer, and a surface insulating layer are consecutively provided on an outer surface of a hollow cylindrical core, and a bearing member for fitting with a bearing is fitted at each opposite end of the heat roll. A pipe or a round bar formed of aluminum, an aluminum alloy, copper, a copper alloy, or the like which has a greater coefficient of thermal conductivity than that of mild steel is disposed inside the core to permit a uniform distribution of the temperature. In addition, a gap of 0.2 mm or more is provided between the inner surface of the core and an outer peripheral surface of the member formed of the high-temperature conductive material.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: December 19, 1989
    Assignee: Hitachi Metals, Ltd.
    Inventors: Ryoichi Shibata, Kiyoshi Kinugawa, Tsutomu Iimura, Yasuo Sawano
  • Electronic apparatus
    Patent number: 4794234
    Abstract: An electronic apparatus including a cabinet, and a lens provided in the cabinet, a transparent keyboard provided on the lens, so that images of things such as letters below the electronic apparatus are magnified and can be seen from the obverse side of said electronic apparatus.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: December 27, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Kinugawa, Seio Kainoh
  • Key switch
    Patent number: 4733024
    Abstract: A key switch is provided with a depressable part having a contact set in its underside and held apart from a stationary contact located below it. The depressable part has a key switch surface located to one side of the center on the upper surface of the depressable part. The key switch is also provided with a rotation fulcrum in the center of the underside of the depressable part. The movable contact is located to one side of the center on the underside of the depressable part to allow the depressable part to turn on the fulcrum so that the movable and stationary contacts can touch each other.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: March 22, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaji Takeshima, Kiyoshi Kinugawa
  • Key input device
    Patent number: 4692740
    Abstract: A key input device to be attached to an electronic apparatus includes a keyboard having a plurality of key switches, and an exchangeable connector that is connectable to a body of the electronic apparatus for enabling the keyboard to be selected so that information is inputted into the electronic apparatus by the keyboard.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: September 8, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Isamu Washizuka, Kiyoshi Kinugawa