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:
Oct. 21, 1980
Filed:
Feb. 26, 1979
Applicant:
Inventor:
George A Bowman, Vernon Hills, IL (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455 87 ; 375-8 ;
Abstract
A modem for transmitting data over one frequency and receiving data over another frequency is disclosed having an oscillator for generating a first signal, a voltage controlled oscillator for generating a second signal, a mixer for mixing the first and second signals to provide a mixer output signal having the transmission frequency, an input data switch for modulating the mixer output signal in accordance with input data, a second mixer connected to the voltage controlled oscillator and to the received incoming signal and a receiver for demodulating the received signal data.