Inventor · disambiguated record

Douglas Brian Gutzmann

Also filed as: GUTZMANN DOUGLAS B · GUTZMANN DOUGLAS BRIAN

2 granted patents·173 citations·filing 1997–1998

70Inventor score

Technology areasH04M

Files withNORTEL NETWORKS CORP1 NORTEL NETWORKS LTD1

Top patents by PatentIndex Score

2 records

0177US6327347B1Calling party identification authentication and routing in response theretoNORTEL NETWORKS LTD·Filed 1998·Granted Dec 4, 2001·95 cites·39 claims
0269US6118861ACalling party invoked held call monitoringNORTEL NETWORKS CORP·Filed 1997·Granted Sep 12, 2000·78 cites·24 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →