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. 06, 1990
Filed:
Feb. 16, 1988
Applicant:
Inventor:
Kiyoshi Amazawa, Tokyo, JP;
Assignee:
Clarion Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
381 94 ; 455297 ; 455303 ;
Abstract
A pulsating noise removal device includes first and second variable attenuators for varying signal levels of an audio signal component and a noise signal component both involved in an entered signal to use an output of the first variable attenuator to control the first and second variable attenuators and to use an output of the second attenuator to control a gate circuit for switching the entered signal, so that an inversion phenomenon is reliably prevented against a change either in the audio signal level or in the audio signal frequency.
Amazawa, Kiyoshi. (1990). Pulsating noise removal device (U.S. Patent No. 4899389). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4899389
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile