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:
Jul. 07, 1987
Filed:
Apr. 15, 1985
Applicant:
Inventor:
Jorgen Heide, Cordoba, TN (US);
Assignee:
Richards Medical Company, Memphis, TN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ; H03G / ;
U.S. Cl.
CPC ...
381 686 ; 307493 ; 328168 ; 328172 ; 381 68 ; 381 69 ; 381104 ; 381109 ; 381120 ;
Abstract
A touch sensitive electronic volume control circuit so that the gain of an amplifier can be changed to any level from zero to maximum and the gain can be retained for periods of time without user adjustment or for power supply replacement.