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:
Nov. 16, 1976
Filed:
Sep. 13, 1974
Applicant:
Inventor:
Yoshio Yamazaki, Suwa, JA;
Assignee:
Kabushiki Kaisha Suwa Seikosha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
3501 / ;
Abstract
The contrast and thereby the visibility of indicia on a liquid crystal display device are enhanced by placing a film on said device in a position to reflect scattered light and by the use of a suitably placed shield to prevent specular reflection of incident light to the eye of the observer.
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Yamazaki, Yoshio. (1976). Liquid crystal display device with enhanged contrast (U.S. Patent No. 3992081). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3992081
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile