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:
Jul. 11, 1995
Filed:
Jun. 04, 1993
Applicant:
Inventors:
Assignee:
Ainsworth Technologies Inc., North York, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379 55 ; 379 58 ; 455 551 ; 348-6 ; 348 12 ; 348 13 ;
Abstract
A communication system, particularly for a mine, has a broad band distribution system. Antennas, which may comprise leaky coax feeders, are connected to this distribution system by interface units. As required, the interface units effect signal level adjustment, frequency translation, and/or modulation technique changes. It is provided for each of the distribution system and the antennas to have separate in- and out- bound broad band spectra, with the antenna typically utilizing different frequency bands from the distribution system. A variety of information, including mobile and fixed radio, LANs, data acquisition systems, video, can communicate over this system.