ALEXANDRIA, Va., Feb. 1 -- James Parker and Randall Wang, both of Temple City, Calif., have developed alarm systems designed to verify/deny false alarms.
According to the U.S. Patent & Trademark Office: "A digital verification control, which is incorporated with an alarm system, includes a first timer device for presetting a single zone verification time in the control panel and second timer device for presetting a multiple zone verification time in the control panel. The single zone verification time is a single detector time delay and arranged when one of the sensors detects at least two triggered signals in the respective detecting area within the single zone verification time, the local warning system is activated for producing a local warning signal."
An abstract of the invention, released by the Patent Office, said: "The multiple zone verification time, which is longer than the single zone verification time, is a multiple detector time delay and arranged when the two sensors detect two triggered signals in the detecting areas respectively within the multiple zone verification time, the local warning system is activated for producing the local warning signal."
The inventor was issued U.S. Patent No. 7,323,978 on Jan. 29.
The patent has been assigned to EE Systems Group Inc., Temple City.
The original application was filed on Feb. 16, 2005.