Patents by Inventor Junzo Aisa

Junzo Aisa 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).

  • Magnetic float for magnetic sensor
    Patent number: 4959997
    Abstract: A magnetic float for a magnetic sensor wherein magnetized magnetic powder is dispersed into a foamed synthetic resin, and the magnetic flux thereof acts on a reed switch in the magnetic sensor to turn on or off the reed switch. The magnetic powder is substantially wholly coated with the synthetic resin.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: October 2, 1990
    Assignee: Ishikawa Tekko Kabushiki Kaisha
    Inventors: Junzo Aisa, Mituo Yamamoto
  • Iron powder attracting magnet
    Patent number: 4857188
    Abstract: An iron powder attracting magnet, wherein a plurality of spaces are formed to open to an iron powder attracting surface and partitioned by a partition for attracting and removing iron powder contained in a fluid. The iron powder attracting magnet is made of a magnetic material which is prepared by impregnating a strontium ferrite into a synthetic resin.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: August 15, 1989
    Assignee: Ishikawa Tekko Kabushiki Kaisha
    Inventors: Junzo Aisa, Eizi Kosugi
  • Drain bolt
    Patent number: 4810148
    Abstract: A drain bolt wherein a recess is formed at the end of a male-threaded portion of a bolt body, and a sinker portion of a synthetic resin magnet is embedded in the recess of the bolt body so that a projecting portion of the magnet is projected from the end of the male-threaded portion of the bolt body. The projecting portion of the synthetic resin magnet is larger in diameter than the sinker portion. A plurality of grooves are formed on the side of the projecting portion of the synthetic resin magnet along its length.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: March 7, 1989
    Assignee: Ishikawa Tekko Kabushiki Kaisha
    Inventors: Junzo Aisa, Eizi Kosugi