Patents by Inventor Shoji Niwa

Shoji Niwa 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).

  • Brazing fillers for sealing vacuum-tight vessels, vacuum-tight vessels and method for manufacturing vacuum-tight vessels
    Patent number: 5916520
    Abstract: The brazing filler of the present invention is excellent in wetting properties towards the open end of a ceramic cylinder and a metal sealing cap can be sealed well on the open end. The present brazing filler comprises Ag, Cu and active metal, in which the Cu-active metal compound is contained in an amount of not more than 40% by volume.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: June 29, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miho Maruyama, Masako Nakahashi, Kiyoshi Osabe, Rika Takigawa, Shoji Niwa
  • Clamp type galvanometer
    Patent number: 4283677
    Abstract: A clamp type galvanometer comprising a current transformer constituted from a coil-wounded split iron core pivotally secured so that it can be opened or closed, a lever for opening or closing said split iron core, a meter assembly consisting of a pointer and graduations for indicating the output of said current transformer through a cut-over circuit in the measuring range, and a grip for actuating said cut-over circuit in the measuring range. The device is compactly housed in a case of a size portable with one hand.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: August 11, 1981
    Inventor: Shoji Niwa