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. 23, 1990
Filed:
Sep. 04, 1987
Applicant:
Inventor:
Gerald L Vick, Mount Vernon, IA (US);
Assignee:
Rockwell International Corporation, El Segundo, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358253 ; 358252 ; 3502 / ; 350316 ;
Abstract
A contrast enhancement filter for use on display devices which utilizes a multiple bandpass optical interference filter with the passbands matched to any predetermined desired frequencies of the display device and a circular polarizer disposed outwardly from said interference filter and an anti-reflective coating deposited thereon.