John F. Gerhardt

Follow

Person

Los Gatos, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Donned and doffed headset state detection
- Patent number 8,559,621
- Issue date Oct 15, 2013
- Plantronics, Inc.
- John F Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Donned and doffed headset state detection
- Patent number 8,538,009
- Issue date Sep 17, 2013
- Plantronics, Inc.
- John F Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Donned and doffed headset state detection
- Patent number 8,335,312
- Issue date Dec 18, 2012
- Plantronics, Inc.
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo reduction for a headset or handset
- Patent number 7,227,944
- Issue date Jun 5, 2007
- Plantronics, Inc.
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo reduction for a headset or handset
- Patent number 7,039,179
- Issue date May 2, 2006
- Plantronics, Inc.
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
DONNED AND DOFFED HEADSET STATE DETECTION
- Publication number 20130210497
- Publication date Aug 15, 2013
- Plantronics, Inc.
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DONNED AND DOFFED HEADSET STATE DETECTION
- Publication number 20130095894
- Publication date Apr 18, 2013
- Plantronics, Inc.
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Donned and doffed headset state detection
- Publication number 20080080705
- Publication date Apr 3, 2008
- John F. Gerhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE