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, 1995
Filed:
Sep. 30, 1993
Robert M Engelke, Madison, WI (US);
Kevin Colwell, Middleton, WI (US);
Ronald W Schultz, Madison, WI (US);
Jeffrey Hilliard, Verona, WI (US);
Troy Vitek, Madison, WI (US);
Ultratec, Inc., Madison, WI (US);
Abstract
A telecommunication device for the deaf is designed to operate under an enhanced TDD communication protocol. The TDD is capable of communicating with conventional TDDs operating under normal Baudot/Weitbrecht communications, but is also capable of communicating with a similarly enhanced TDD utilizing an enhanced protocol with a faster data transfer rate. The enhanced TDD is capable of signaling to another remote TDD through the use of a synchronization character that it is capable of enhanced TDD communications. If a similar synchronization character is received from the remote station, both TDDs can then switch to enhanced TDD communication with its advantages of speed and enlarged character set. The enhanced protocol permits increased functionality of the TTD terminals in providing machine-to-machine communication in a manner invisible to the TTD user. A machine-to-machine control character similar to the synchronizing character is used to designate such messages.