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. 05, 1994
Filed:
May. 20, 1992
Robert M Engelke, Madison, WI (US);
Kevin Colwell, Middleton, WI (US);
Ronald W Schultz, Madison, WI (US);
Ultratec, Inc., Madison, WI (US);
Abstract
A telecommunication device for the deaf operates under conventional Baudot communication protocol, but has enhanced features enabling it to handle interrupts either from a conventional or a similar TDD. The improved TDD is also capable of pseudo-duplex communication with a similar TDD in which each device transmits packets of characters alternatively to the other thus making it appear to the users that simultaneous transmission is occurring. The implementation of these features is done in such a way that the TDD is fully capable of communication with existing TDD devices and the device obeys normals rules and conventions for Baudot communication.