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:
Feb. 17, 2009
Filed:
Jul. 27, 2005
Applicant:
Stephen P. Mcgrew, Spokane, WA (US);
Inventor:
Stephen P. McGrew, Spokane, WA (US);
Assignee:
New Light Industries, Ltd., Spokane, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to an anticounterfeiting device comprising a form birefringent surface relief structure bearing a colored three-dimensional polarization image. The structure may be composed of pixels whose surface relief microstructure and composition determines the direction and color of zero-order diffracted light visible from each pixel when the structure is illuminated with polarized light and viewed through an analyzer that passes light of the opposite polarization.