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:
Nov. 23, 1993
Filed:
Oct. 16, 1990
Applicant:
Inventors:
C H Jolissaint, Sunnyvale, CA (US);
Gregg W Kerlin, Los Gatos, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379386 ; 379 94 ; 379164 ; 379257 ; 379100 ;
Abstract
Apparatus and method for communicating a call answered event and other communication services selection information to a call originating device (telephone). Tone signalling technology (DTMF) is used to indicate call progress. DTMF signals are generated by the switching system or associated telephony equipment.