Inventor · disambiguated record
John F. Gerhardt
Also filed as: GERHARDT JOHN F
5 granted patents·141 citations·filing 2002–2012
83Inventor score
Top patents by PatentIndex Score
5 records- 0194US8559621B2Donned and doffed headset state detectionPLANTRONICS·Filed 2012·Granted Oct 15, 2013·23 cites·11 claims
- 0294US8335312B2Donned and doffed headset state detectionGERHARDT JOHN F·Filed 2006·Granted Dec 18, 2012·90 cites·20 claims
- 0392US8538009B2Donned and doffed headset state detectionPLANTRONICS·Filed 2012·Granted Sep 17, 2013·15 cites·3 claims
- 0469US7039179B1Echo reduction for a headset or handsetPLANTRONICS·Filed 2002·Granted May 2, 2006·12 cites·19 claims
- 0561US7227944B1Echo reduction for a headset or handsetPLANTRONICS·Filed 2006·Granted Jun 5, 2007·1 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →