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:
Dec. 05, 1989
Filed:
Dec. 01, 1987
Applicant:
Inventors:
Dennis J O'Brien, West Linn, OR (US);
Paul G Hanson, Portland, OR (US);
Thomas D Klarquist, Beaverton, OR (US);
Bruce C Nepple, Portland, OR (US);
Michael C Park, Portland, OR (US);
Robin R Rosas, Beaverton, OR (US);
Assignee:
AT&E Corporation, San Francisco, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379 67 ; 379 77 ; 379351 ; 379386 ;
Abstract
A voice mail system includes method and apparatus for muting a previously recorded audio signal upon detection of a DTMF signal to differentiate between recorded DTMF signals and valid DTMF commands. A DTMF signal detected after muting is recognized as an invalid command.