Patents by Inventor Atsushi Ohkawara

Atsushi Ohkawara 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).

  • Fire alarm system
    Patent number: 5635904
    Abstract: A fire alarm system having terminal units in a supervisory system for supervising a fire phenomenon, a receiving portion and terminal units in a control system to be controlled by the receiving portion that is able to reduce a required space in a case of a small size system. The terminal units in the supervisory system are given individual addresses, the terminal units in the supervisory system and the receiving portion communicate with each other through the addresses, and the terminal units in the control system are connected to the receiving portion through individual signal lines.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: June 3, 1997
    Assignee: Nohmi Bosai Ltd.
    Inventors: Keiichi Takahashi, Atsushi Ohkawara