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:
Mar. 01, 1977
Filed:
Jun. 26, 1975
Applicant:
Inventors:
Johnny Collins, Oak Park, IL (US);
Charles H Heuer, Glencoe, IL (US);
Assignee:
Zenith Radio Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
325391 ; 178D / ; 325392 ; 3401 / ;
Abstract
An integrated digital circuit for a wireless remote control system employs a first counter to distinguish the frequency of actuating signals and a confidence counter for establishing a minimum duration for an actuating signal. Logic circuitry responsive to an externally applied voltage level controls the operation of a three stage binary counter and a flip-flop to selectively initiate a first mode utilizing two frequencies for control of an eight step bi-directional volume function and a second mode in which the same two frequencies control a four state cyclic volume function and a bi-stable picture control.