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:
Feb. 24, 1976
Filed:
Apr. 24, 1974
Applicant:
Inventors:
Hiroji Ohigashi, Kamakura, JA;
Reiko Shigenari, Fujisawa, JA;
Syozo Ogawa, Kamakura, JA;
Nobuo Sekine, Kamakura, JA;
Assignee:
Toray Industries, Inc., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310-85 ; 310-83 ; 310-86 ; 310-91 ; 310-95 ; 340265 ; 200181 ;
Abstract
A key input device which forms a key switch with high reliability or an integrated keyboard with small dimensions which can produce coded signals with high reliability and a S/N ratio of high value without any encoder circuits, comprising a piezoelectric polymer film, applied as a pressure sensor, having layer electrodes on both surfaces thereof and at least one device for straining the film, the straining device defining a key.
Quick Actions:
Ohigashi, Hiroji. (1976). Polymeric piezoelectric key actuated device (U.S. Patent No. 3940637). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3940637
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile