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. 15, 1977
Filed:
Feb. 13, 1976
Applicant:
Inventor:
David James Martin, Leatherhead, EN;
Assignee:
Coal Industry (Patents) Limited, London, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
325 28 ; 325 51 ;
Abstract
A leaky feeder radio transmission system uses twin feeders connected respectively to a transmitter and receiver at a base station. The feeders are connected at intervals by uni-directional amplifiers which, alternately along the lines, are connected for conduction in opposite directions. Filters are positioned in the line between amplifier connection points. A mobile station adjacent to the feeders receives signals at one frequency from the feeders and transmits signals at a second frequency.