David E. Schulz

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Wheaton, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Telephone relay system
- Patent number 5,926,527
- Issue date Jul 20, 1999
- AT&T Corp.
- Ronald Dean Jenkins
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiply accommodated message relaying for hearing impaired callers
- Patent number 5,745,550
- Issue date Apr 28, 1998
- AT&T
- Jerry Eisdorfer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Smart messages and smart macros for telecommunications relay servic...
- Patent number 5,680,443
- Issue date Oct 21, 1997
- AT&T
- Leonard Ralph Kasday
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Language accommodated message relaying for hearing impaired callers
- Patent number 5,475,733
- Issue date Dec 12, 1995
- AT&T Corp.
- Jerry Eisdorfer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Relaying of messages between hearing impaired callers using keyboar...
- Patent number 5,463,665
- Issue date Oct 31, 1995
- AT&T Corp.
- William L. Millios
- H04 - ELECTRIC COMMUNICATION TECHNIQUE