Inventor · disambiguated record
Nga V. Chau
Also filed as: CHAU NGA V
5 granted patents·618 citations·filing 1989–1996
87Inventor score
Technology areasH04M
Top patents by PatentIndex Score
5 records- 0194US4972461ACall message delivery system and methodAT & T BELL LAB·Filed 1989·Granted Nov 20, 1990·205 cites·23 claims
- 0287US5187710AMethod and apparatus for the billing of value-added communications callsAT & T BELL LAB·Filed 1990·Granted Feb 16, 1993·174 cites·36 claims
- 0384US5333180ACall message delivery system and method utilizing caller-selected system announcementsAT & T BELL LAB·Filed 1991·Granted Jul 26, 1994·120 cites·17 claims
- 0482US4939771AAttendant-controlled call message delivery system and methodAT & T BELL LAB·Filed 1989·Granted Jul 3, 1990·75 cites·20 claims
- 0564US5751792ASystem and method for providing a message system subscriber with a roaming mailboxAT & T CORP·Filed 1996·Granted May 12, 1998·44 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →