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. 12, 1993
Filed:
Sep. 19, 1990
Applicant:
Inventors:
Jun-ichi Hirataka, Hitachi, JP;
Katsumi Kondo, Katsuta, JP;
Yasushi Tomioka, Hatoyama, JP;
Shuji Imazeki, Hatoyama, JP;
Yoshio Taniguchi, Hino, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359 73 ;
Abstract
A liquid crystal display device includes a phase-plate disposed between a pair of substrates, preferably inside of the electrode, to increase the transmission rate and improve the contrast ratio of the display.
Hirataka, Jun-ichi. (1993). Liquid crystal display device with birefringent film between the (U.S. Patent No. 5179457). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5179457
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile