The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1992
Filed:
Oct. 16, 1990
Applicant:
Inventor:
Richard A Johnson, Roseville, CA (US);
Assignee:
C & K Systems, Co., Folsom, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340541 ; 340522 ; 340526 ;
Abstract
A multi-sensor intrusion detection system having improved immunity to false alarm is disclosed. The sensor being less susceptible to the generation of false alarm has its output signal processed and held. The held signal is supplied to a logic gate which receives directly the signal from the other sensor. The output of the logic gate generates an alarm signal.