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:
Jan. 26, 1988
Filed:
Aug. 07, 1986
Applicant:
Inventors:
Roger W Phillips, Santa Rosa, CA (US);
Vernon C Spellman, Santa Rosa, CA (US);
Wayne L Gossett, Santa Rosa, CA (US);
Marc A Kamerling, Santa Rosa, CA (US);
Assignee:
Optical Coating Laboratory, Inc., Santa Rosa, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
215230 ; 206459 ; 206807 ; 229102 ; 350166 ;
Abstract
Tamper evident optically variable device comprising an optically variable device having at least first and second layers with a spacer layer therebetween providing a color shift with change in viewing angle. A release layer is disposed between the first and second layers to permit the first and second layers to be separated from each other and to thereby destroy the optical shifting properties of the optically variable device.