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. 13, 1996
Filed:
May. 28, 1993
Larry Schotz, Mequon, WI (US);
L. S. Research, Inc., Cedarburg, WI (US);
Abstract
A transmitter/receiver system for the simultaneous transmission and reception of plural audio signals over the air for a short range using carrier signals of frequencies over 900 MHz. A combined signal having a plurality of carrier signals, each modulated by a different audio signal, is transmitted. The receiver, separated from the transmitter by a distance of 10 to 300 feet, receives the combined signal and the listener then selects one of the frequency modulated carrier signals in the combined signal at the receiver with a selector switch. One of a set of combined signals is selected at the transmitter, allowing for a choice of different frequencies for transmission, to avoid interference with other systems in the vicinity. Moreover, where predetermined, e.g., fault, conditions occur in the transmitter and/or receiver, muting circuits within the receiver are activated for the duration of the predetermined, e.g., fault, condition to silence the audio output signal to the listener and thereby prevent the thumping and hissing that a listener usually experiences during power transients and unlocked signal conditions.