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. 19, 1985
Filed:
Jul. 27, 1983
Applicant:
Inventor:
Yuji Harada, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
3503 / ; 3502 / ; 3503 / ;
Abstract
This invention discloses a keyboard switch with display function composed of two transparent sheets constituting a pressure operable switch and placed on a display unit. The upper of two transparent sheets is provided with an unflat top surface for avoiding unnecessary reflection.
Harada, Yuji. (1985). Keyboard switch with a mesh of fibers (U.S. Patent No. 4553820). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4553820
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile