Richard J. Piereth

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Naperville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Automation of telephone operator assistance calls
- Patent number 5,185,781
- Issue date Feb 9, 1993
- AT&T Bell Laboratories
- Douglas C. Dowden
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automation of telephone operator assistance calls
- Patent number 5,181,237
- Issue date Jan 19, 1993
- AT&T Bell Laboratories
- Douglas C. Dowden
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automation of telephone operator assistance calls
- Patent number 5,163,083
- Issue date Nov 10, 1992
- AT&T Bell Laboratories
- Douglas C. Dowden
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
More efficient call handling for operator assistance calls
- Patent number 4,899,375
- Issue date Feb 6, 1990
- American Telephone and Telegraph Company, AT&T Bell Laboratories
- Thomas M. Bauer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semi-automated directory assistance systems
- Patent number 4,677,609
- Issue date Jun 30, 1987
- American Telephone and Telegraph Company, AT&T Bell Laboratories
- Richard J. Piereth
- H04 - ELECTRIC COMMUNICATION TECHNIQUE