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. 20, 1979
Filed:
Apr. 07, 1976
Applicant:
Inventors:
Kenneth F Umpleby, Ann Arbor, MI (US);
William C Apple, Brighton, MI (US);
Assignee:
Multi-Elmac Company, Novi, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
343225 ; 3401 / ; 3401 / ; 3401 / ; 325 37 ; 325 55 ; 325 64 ;
Abstract
A digital radio control system comprising a transmitter for producing a repeating series of width modulated pulses, and a receiver responsive only to a series of predetermined pulse characters to actuate a load device such as a garage door operator. Both the transmitter and the receiver circuits comprise simple counter circuits and switches to define the pulse codes. The receiver counter is clocked by the transmitted pulse series and actuates the output circuit only if it reaches the final counter stage at least once.