Patents by Inventor Chikamasa Tomiya

Chikamasa Tomiya 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).

  • Hollow housing case for sheathing and electromagnetically shielding electrical apparatus
    Patent number: 5028740
    Abstract: A hollow housing case of an electriclly conducting plate which has one insulating surface includes a connecting part to connect together electrically both ends of the plate. The connecting part is a bent portion which is formed by bending at least one end of the plate and enabling the non-insulating surfaces at both ends to face and contact with each other surely. Further, the hollow housing case comprises a fastening member for finally fastening together both ends of the plate. By the fastening member, a hollow housing case of any size can be fabricated easily, without the process of pressing.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: July 2, 1991
    Assignee: Iwastu Electric Co., Inc.
    Inventor: Chikamasa Tomiya
  • Shield case
    Patent number: 4737597
    Abstract: A shield case consists of a case member for housing an electronic circuit. The case member consists of a single printed wiring board having first and second copper films formed on two major surfaces thereof. The first copper film serves as an outer surface coating of the case and is connected to a frame ground terminal. The second copper film serves as an inner surface coating of the case and is connected to a signal ground terminal.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: April 12, 1988
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Chikamasa Tomiya, Noriyuki Matsushima