Patents by Inventor Roger A. Simpson

Roger A. Simpson 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 pull station
    Patent number: 4551707
    Abstract: In order to pull a fire alarm door to actuate an alarm, a complimentary door must first be pushed in so as to permit an operator to pull the fire alarm door.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: November 5, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Roger A. Simpson
  • Fire alarm housing
    Patent number: D276708
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: December 11, 1984
    Assignee: Emhart Industries, Inc.
    Inventor: Roger A. Simpson