Patents by Inventor Kunio Ikai

Kunio Ikai 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).

  • Logic circuit equivalent to a relay contact circuit
    Patent number: RE29917
    Abstract: A logic circuit comprises a serially connected circuit structure and a wired OR connected circuit structure of unit circuits, each of which is composed of logic elements and equivalent to a relay contact. The respective unit circuit is connected with associated equipment in a manner similar to that used in connecting relay contacts, on a base of a circuit diagram, whereby a logic circuit equivalent to the relay contact circuit is formed.
    Type: Grant
    Filed: September 24, 1976
    Date of Patent: February 20, 1979
    Assignee: Naigai Industries, Inc.
    Inventors: Yosihiko Kumakawa, Kunio Ikai