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. 02, 1996
Filed:
Apr. 28, 1994
Applicant:
Inventors:
Gad Talmon, Kiryat Ono, IL;
Zvi Dershowitz, Givat Shmuel, IL;
Assignee:
Elisra Electronic Systems Ltd., Bnei Brak, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502221 ; 340555 ; 109 56 ;
Abstract
A system for monitoring a multiplicity of doors including at least two optical transceivers mounted on each of the multiplicity of doors and communication apparatus for communicating with the optical transceivers mounted on each of the multiplicity of doors thereby to verify their position, the communication apparatus being operative to communicate with the optical transceivers on each of the multiplicity of doors via plural serial communications pathways, at least one of the plural pathways extending via optical transceivers mounted on a plurality of different doors.