Patents by Inventor John R. Charais

John R. Charais 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).

  • System and method for antenna failure detection
    Patent number: 6114955
    Abstract: In a wireless security system, the system controller includes one or more antennas for reception of signals from remote sensor-transmitter units. To detect antenna failure, the system controller generates a test signal with a known parameter and transmits this test signal via a first antenna. The system controller then measures the parameter of the corresponding test signal received, if any, via a second antenna, and compares the parameter of the corresponding test signal received to a predetermined threshold parameter. When the parameter of the test signal received via the second antenna differs from the threshold by a predetermined amount, or predetermined margin for error, an antenna failure message is generated.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: September 5, 2000
    Assignee: Interactive Technologies, Inc.
    Inventors: Robert E. Brunius, John R. Charais