Patents by Inventor Teruhiko Akanuma

Teruhiko Akanuma 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).

  • Discharge tube capable of stable voltage discharge
    Patent number: 5061877
    Abstract: An arc discharge device is formed by two electrodes which are hermetically sealed within a glass tube filled with an inert gas. One electrode is cup shaped, with an open end. The other electrode enters the open end and approaches the bottom of the cup shape. The distance are such that the arc discharge occurs between the bottom of the cup and the end of the other electrode. The side wall of the cup shields the arc.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: October 29, 1991
    Assignee: NEC Corporation
    Inventor: Teruhiko Akanuma
  • Mercury wetted contact switch
    Patent number: 4804932
    Abstract: A glass reed relay has an elongated glass enclosure with an electrode passing through and being sealed to each of the opposite ends of said enclosure. One of the electrodes has an associated reed for making and breaking contact with the other of said electrodes. The other electrode has a hollow tubular structure filled with mercury. The dimensions are such that only a limited amount of mercury can escape therefrom in order to wet the contacts without creating a pool of mercury.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: February 14, 1989
    Assignee: NEC Corporation
    Inventors: Teruhiko Akanuma, Masaharu Enomoto