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. 12, 2021
Filed:
May. 23, 2016
Applicant:
Rolic Ag, Zug, CH;
Inventors:
Reto Genini, Basel, CH;
Julien Martz, Mulhouse, FR;
Etienne Berner, Munchenstein, CH;
Benoit Schill, Bouxwiller, FR;
Assignee:
ROLIC AG, Zug, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02B 27/28 (2006.01); B42D 25/364 (2014.01); B42D 25/391 (2014.01); B42D 25/41 (2014.01);
U.S. Cl.
CPC ...
B42D 25/364 (2014.10); B42D 25/391 (2014.10); B42D 25/41 (2014.10); G02B 5/305 (2013.01); G02B 5/3016 (2013.01);
Abstract
The invention relates to an optical security device with multiple hidden images which become visible by arranging a polarizer above or below the device. Additional images become visible upon rotation of the polarizer. The optical device comprises two patterned optical retarders and a polarizer between the retarders.