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:
Jul. 06, 1999
Filed:
Apr. 12, 1996
Applicant:
Inventors:
Sanford Cobb, Jr, St. Mary's Point, MN (US);
Mark E Gardiner, Santa Rosa, CA (US);
Keith M Kotchick, Woodbury, MN (US);
Kazuhiko Toyooka, Yamagata, JP;
William A Hibbard, Woodbury, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; B32B / ;
U.S. Cl.
CPC ...
428156 ; 428141 ; 428156 ; 428913 ; 428179 ; 428167 ; 428163 ; 359530 ; 359831 ; 359834 ; 359833 ; 359837 ; 362337 ; 362339 ; 362 26 ; 385146 ; 385901 ; 385 36 ;
Abstract
The present invention includes a structured optical film with variable pitch peaks and/or grooves to reduce the visibility of moire interference patterns and optical displays incorporating one or more layers of the film. The pitch variations can be over groups of adjacent peaks and/or valleys or between adjacent pairs of peaks and/or valleys.