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:
Aug. 16, 1988
Filed:
Jun. 07, 1985
Applicant:
Inventor:
Walter Schneider, Miesbach, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09C / ; G09C / ; B42D / ; B05D / ;
U.S. Cl.
CPC ...
283 70 ; 283 74 ; 283 83 ; 428212 ;
Abstract
In order to increase the protection against forgery of a security paper, a security inlay made of polymer material having piezoelectric and/or pyroelectric properties is embedded in the security paper. The presence of such an inlay can be tested by means of contacting and non-contacting measuring methods.