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, 2006
Filed:
Mar. 08, 2004
Applicants:
Haixiang Liang, Palo Alto, CA (US);
Zarko Draganic, Belvedere, CA (US);
Inventors:
Haixiang Liang, Palo Alto, CA (US);
Zarko Draganic, Belvedere, CA (US);
Assignee:
Broadcom Corporation, Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Reliable detection of a call-waiting tone is provided by employing a correlation based technique. A modem or other device employing such a technique need not rely on carrier drop detection and is generally insensitive to other energy or noise on the line.