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:
Jun. 03, 1986
Filed:
Feb. 16, 1984
Applicant:
Inventors:
Ingeborg Patzelt, Berlin, DE;
Werner Horn, Berlin, DE;
Assignee:
Zeiss Ikon AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235382 ; 235454 ; 235475 ; 361172 ;
Abstract
The present invention provides a safety lock actuatable with a flat key carrying a code. The code is digitally generated by a laser beam and is sensed by detector laser beam upon or after the introduction of the key into the lock. The digital coding is produced by means of burning discrete depressions into a suitable layer on the key with a sufficiently strong laser beam and the sensing of the coding is done by means of a weaker laser beam.