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:
Oct. 18, 1988
Filed:
Aug. 06, 1986
Applicant:
Inventors:
Isaiah B Micznik, Farmington Hills, MI (US);
David A Tenenbaum, Oak Park, MI (US);
Jeffrey Tenenbaum, Southfield, MI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
34082531 ; 70278 ; 34082534 ; 34082569 ; 34082572 ;
Abstract
An electronic security system having a locked and at least one unlocked state and comprising at least one electronic access controller and at least one electronic key. The electronic security system employs a predetermined, distinctive, first code stored in memories in each access controller and key, and each electronic key stores a predetermined second code consisting of a number part and an associated time delay part. The number parts of all second codes are also stored in the access controller memory.