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:
Jul. 17, 1990
Filed:
Mar. 31, 1989
Applicant:
Inventors:
Kazumasa Yamauchi, Suita, JP;
Susumu Katayama, Hirakata, JP;
Assignee:
Matsushita Electric Works, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340522 ; 340541 ; 340567 ;
Abstract
A composite type crime preventive sensor processes output detection signals from a plurality of sensor units of mutually different detection systems for ranking the signals into a plurality of grades depending on signal level, and provides an intruder detection signal when a sum of ranked level values is above a preset reference value, whereby any risk of alarm failing and erroneous alarming can be effectively minimized.