Patents by Inventor Tadahiko Kohama

Tadahiko Kohama 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).

  • Methods of producing resin moldings
    Patent number: 6274070
    Abstract: Provided are a conductive resin composition having little negative impact on the environment, a resin molding which includes conductive parts of the conductive resin composition and insulating parts, and their methods of production. The production costs for the resin molding are low. The conductive resin composition is formed by kneading a thermoplastic or thermosetting resin with a low melting point alloy, wherein the low melting point alloy is moldable with the resin and consists essentially of tin and is free of lead. An insulating body is formed through primary molding of a thermoplastic or thermosetting resin, and is integrated with conductive parts of the conductive resin composition through secondary molding; or alternatively, conductive parts are formed through primary molding of the conductive resin composition and an insulating body is formed while being integrated with the conductive parts through secondary molding.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: August 14, 2001
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tsuyoshi Tanigaki, Shogo Izawa, Akikazu Matsumoto, Tadahiko Kohama
  • Resin compositions, resin moldings and their methods of production
    Patent number: 6096245
    Abstract: Provided are a conductive resin composition having little negative impact on the environment, a resin molding which includes conductive parts of the conductive resin composition and insulating parts, and their methods of production. The production costs for the resin molding are low. The conductive resin composition is formed by kneading a thermoplastic or thermosetting resin with a low melting point alloy, wherein the low melting point alloy is moldable with the resin and consists essentially of tin and is free of lead. An insulating body is formed through primary molding of a thermoplastic or thermosetting resin, and is integrated with conductive parts of the conductive resin composition through secondary molding; or alternatively, conductive parts are formed through primary molding of the conductive resin composition and an insulating body is formed while being integrated with the conductive parts through secondary molding.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: August 1, 2000
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tsuyoshi Tanigaki, Shogo Izawa, Akikazu Matsumoto, Tadahiko Kohama
  • Vehicular exterior trim accessory having a built-in antenna
    Patent number: 5945956
    Abstract: A vehicular exterior trim accessory having a built-in antenna body is constructed to include: a hollow body 21 blow-molded into a predetermined shape having an internal space; and an antenna body 3 fixed in the hollow body 21 and arranged in the internal space by the blow-molding method. The hollow body 21 and the antenna body 3 are made integral.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: August 31, 1999
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Shogo Izawa, Yoshiro Hattori, Tadahiko Kohama, Nobutoshi Hase, Takaaki Nakano, Yoichi Kaneyasu, Takayuki Ohira, Takayoshi Ito, Tsuneyuki Koike
  • Injection molding machine and method
    Patent number: 4734243
    Abstract: An injection molding machine for plastics and any other similar materials. This invention molding machine is provided with a plasticization device for exclusive use which consecutively plasticizes material and feeds plasticized material to a plurality of injection devices in regular sequence. Each of the injection devices has its corresponding mold clamping device. By virtue of this construction, working efficiency of main sections of the machine is increased, resulting in a higher productivity of the entire injection molding machine.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: March 29, 1988
    Assignees: Aisin Seiki Kabushiki Kaisha, The Japan Steel Works, Ltd.
    Inventors: Tadahiko Kohama, Susumu Shibata, Shogo Izawa, Takami Noda, Atsuo Teraoka