Patents by Inventor Sei Shiragaki

Sei Shiragaki 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).

  • Load drive control element check circuit
    Patent number: 4384844
    Abstract: The present disclosure relates to a load drive control element check circuit for checking whether or not conduction and non-conduction troubles take place in a load controlling switching element at the final output stage of a control device, which is required for safety, such as a combustion control circuit.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: May 24, 1983
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Yuji Yamamoto, Sei Shiragaki
  • D-Type flip-flop circuit
    Patent number: 4374331
    Abstract: A delay circuit in a conventional D type flip-flop circuit sets a flip-flop to a predetermined logic state in the event of an internal circuit failure.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: February 15, 1983
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Yuji Yamamoto, Sei Shiragaki