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. 02, 2004
Filed:
Feb. 19, 2002
Hossein Eslambolchi, Los Altos Hills, CA (US);
John Sinclair Huffman, Conyers, GA (US);
James F Kirkpatrick, Conyers, GA (US);
AT&T Corp., New York, NY (US);
Abstract
To locate via electromagnetic signaling each of a plurality of buried side leg conveyances ( ) coupled to a common underground backbone conveyance ( ), a cable locating signal generator ( ) applies a plurality of different frequency conveyance locating signals to the backbone conveyance. A separate one of a plurality of filter arrestors ( - ) selective passes a particular one of the plurality of different frequency locating signals onto a corresponding one of the side leg conveyances. In this way, each side leg conveyance carries only a particular frequency locating signal whose strength remains unaffected by the locating signal on the other side leg conveyances.