Patents by Inventor John R. Shirley

John R. Shirley 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).

  • Personnel security system
    Patent number: 4682155
    Abstract: A security sensing system monitors the passage of persons through a door or like opening. A transmitter module having means for transmitting an omnidirectional signal is installed on persons to be monitored and a sensing module for installing adjacent to a door opening to be monitored. The sensing module operates an alarm, but only when the door is opened by a person equipped with a trigger module on his person.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: July 21, 1987
    Assignee: Central Security Mfg. Corp.
    Inventor: John R. Shirley