Patents by Inventor Hiroshi Miyagawa

Hiroshi Miyagawa 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).

  • Vacuum circuit breaker
    Patent number: 4421961
    Abstract: A vacuum power interrupting device comprising a bell-shaped vacuum power interrupter which includes a bell-shaped metallic casing wherein a pair of electrical contact rods are extended for interrupting a large current with a high voltage, and insulating molded block made of a resin for supporting the bell-shaped vacuum power interrupter.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: December 20, 1983
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Shinzo Sakuma, Hifumi Yanagisawa, Kazuo Tokuhata, Hiroshi Miyagawa
  • Method for determining the viable bacteria count of food and a medium for accomplishing the method
    Patent number: 4039386
    Abstract: A method of determining the viable bacterial count of food which comprises incubating said food in a liquified agar medium which contains from 0.005 to 0.1 gram per liter of said liquified agar medium 2, 3, 5-triphenyl tetrazolium chloride as an inhibitor of bacteria colony spreading, and counting the bacteria colonies.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: August 2, 1977
    Assignee: Morinaga Milk Industry Co., Ltd.
    Inventors: Katsuhiro Ogasa, Seiichi Shimamura, Hiroshi Miyagawa