P

Inventor

PETRELLI ROBERT

US7 patents
⚠️ This page may combine multiple inventors who share the name “PETRELLI ROBERT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AT & T CORP

3 patents
US5444713AAug 22, 1995

Telephone information service system using digital and out-of-band signaling

AT & T CORP107 citations92
US5459779AOct 17, 1995

Method for switching telephone calls to information service providers

AT & T CORP96 citations91
US5694459ADec 2, 1997

Personalized information service system

AT & T CORP96 citations88

AT & T BELL LAB

2 patents
US5181237AJan 19, 1993

Automation of telephone operator assistance calls

AT & T BELL LAB157 citations96
US5185781AFeb 9, 1993

Automation of telephone operator assistance calls

AT & T BELL LAB149 citations95

AMERICAN TELEPHONE & TELEGRAPH

1 patent
US4899375AFeb 6, 1990

More efficient call handling for operator assistance calls

AMERICAN TELEPHONE & TELEGRAPH85 citations92

LUCENT TECHNOLOGIES INC

1 patent
US6359980B1Mar 19, 2002

Method for administering advanced number portability numbers

LUCENT TECHNOLOGIES INC15 citations77