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:
Apr. 15, 2008
Filed:
Apr. 12, 2005
Hiroki Umeda, Hino, JP;
Katsusuke Nagashima, Kobe, JP;
Noriyasu Kuzuhara, Kunitachi, JP;
Minori Tamagawa, Hino, JP;
Hiroki Umeda, Hino, JP;
Katsusuke Nagashima, Kobe, JP;
Noriyasu Kuzuhara, Kunitachi, JP;
Minori Tamagawa, Hino, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A method for producing a roll of an optical compensation film, in the effective width of which an angle of the slow axis in the film face with the width direction of the film is within the range of ±1° and an angle of the fast axis in the film face with the length direction of the film is within the range of ±1°, wherein the angle of the fast axis in the film face with the length direction is cyclically varied by a cycle of from 1.5 m to 500 m in the length direction of the film and the minimum amplitude of the variation is within the range of from 0.1° to 1°.