Patents by Inventor Tutomu Ishiguro

Tutomu Ishiguro 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).

  • Circuit for detecting trouble in electric lines connecting relatively movable circuits
    Patent number: 4035612
    Abstract: A circuit for detecting trouble in a sliding contact mechanism comprising a fixed contact portion and a movable contact portion, said fixed portion being connected to an electric power source.A radio-frequency signal is generated when insufficient electrical connection is caused in the sliding contact mechanism by, for example, depositing dusts thereon, said signal being delivered to a suitable alarm device to indicate the troublesome state.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: July 12, 1977
    Assignee: Kabushiki Kaisha KIP
    Inventors: Tutomu Ishiguro, Yukio Katano