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:
May. 16, 1978
Filed:
Feb. 04, 1977
Applicant:
Inventor:
Robert Lee Hart, Indianapolis, IN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
3401 / ; 3401 / ; 3402 / ; 3401 / ; 70363 ;
Abstract
An opto-electronic, key-operated lock device means which provides a connection for one or more opto-electric circuits (control circuits employing light and logic for control of electrical circuits) as an incident to the insertion and operation therein of the proper key. The proper key is encoded for completion of predetermined light paths to photosensors coupled to decoder logic circuits for establishment and disestablishment of the opto-electrical circuits coincident with the use of the proper key.