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. 30, 1991
Filed:
Jun. 21, 1989
Applicant:
Inventor:
Richard D Greenblatt, Cambridge, MA (US);
Assignee:
Academy of Applied Science, Concord, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
370125 ; 370 691 ; 370 76 ; 3701101 ; 3701104 ; 358 85 ; 379 53 ; 379 54 ; 379 96 ;
Abstract
A novel method of and apparatus for voice communication and transparent, non-interfering, automatic digital data exchange between appropriately equipped telephone terminals having cooperative digital signal processing and visual display equipment, using special recognition signal protocol triggering signals and providing modem capability for FAX, printer, microprocessor, answer machines and the like for providing extended services using in-band signalling sensible by users and machines. Such method is useful both with ordinary telephone exchanges and ISDN type exchanges.