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:
Jun. 24, 2003
Filed:
Jan. 16, 2002
Applicant:
Inventors:
Alan B. Campbell, Petaluma, CA (US);
Sanford Cobb, Jr., St. Paul, MN (US);
Wade D. Kretman, St. Paul, MN (US);
Marvin J. Niezgocki, St. Paul, MN (US);
Timothy L. Hoopman, St. Paul, MN (US);
Assignee:
3M Innovative Properties Company, Saint Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 5/300 ; B23P 1/304 ;
U.S. Cl.
CPC ...
B21D 5/300 ; B23P 1/304 ;
Abstract
An optical film having structures that vary in height along their length where the variations have a nominal period of less than forty times the nominal height of the structures is taught. In some embodiments of the invention the variation is random.