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. 23, 1976
Filed:
Nov. 29, 1973
Fred A Brooks, Maplewood, NJ (US);
Other;
Abstract
A self regulating telephone apparatus wherein an individual's speech is converted to a representative electrical signal. This signal is represented by a product wave or waves of the form f(A)t x f(B)t where f(A)t represents the amplitude of the informational signal f(B)t. The signal is separated by demodulation of the cross product into its components. The relative amplitudes of the terms are changed as desired and the cross product re-established by remodulation. Since the term f(A)t represents the amplitude and its frequency range is removed from f(B)t, amplification can be provided at frequencies exhibiting low coupling between the receiver and transmitter transducer in a hand telephone set to permit increasing the signal volume output as required.