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:
May. 03, 1983
Filed:
Sep. 23, 1980
Applicant:
Inventor:
Hidetaka Fujisawa, Fussa, JP;
Assignee:
Casio Computer Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ; H01L / ;
U.S. Cl.
CPC ...
3403 / ; 84-104 ; 84-114 ; 84DI / ; 310317 ; 3403 / ;
Abstract
An envelope control device for the piezoelectric buzzer of the invention applies voltages changing with time to both surfaces of a sound generator for push-pull operation for generating an electric tone. The sound generator comprises an oscillating plate with a piezoelectric element attached thereto, and in response to a tone signal outputted from a tone signal generating circuit, it generates an electric tone. By the push-pull operations, an envelope is applied to the electric tone generated.
Fujisawa, Hidetaka. (1983). Envelope control device for piezoelectric buzzer (U.S. Patent No. 4382251). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4382251
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile