Christopher W. Springfield

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Chandler, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Echo canceler circuit and method
- Patent number 8,811,603
- Issue date Aug 19, 2014
- Continental Automotive Systems, Inc.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo canceler circuit and method
- Patent number 8,238,546
- Issue date Aug 7, 2012
- Continental Automotive Systems, Inc.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo canceler circuit and method
- Patent number 7,599,483
- Issue date Oct 6, 2009
- Temic Automotive of North America, Inc.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Double talk activity detector and method for an echo canceler circuit
- Patent number 7,046,794
- Issue date May 16, 2006
- Motorola, Inc.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Full-duplex hands-free transparency circuit and method therefor
- Patent number 6,799,062
- Issue date Sep 28, 2004
- Motorola Inc.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for noise suppression using external voice activi...
- Patent number 6,618,701
- Issue date Sep 9, 2003
- Motorola, Inc.
- James Brian Piket
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
Echo Canceler Circuit and Method
- Publication number 20130184036
- Publication date Jul 18, 2013
- CONTINENTAL AUTOMOTIVE SYSTEMS, INC.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Echo Canceler Circuit and Method
- Publication number 20100022282
- Publication date Jan 28, 2010
- TEMIC AUTOMOTIVE OF NORTH AMERICA, INC.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Reduced complexity recursive least square lattice structure adaptiv...
- Publication number 20060288067
- Publication date Dec 21, 2006
- MOTOROLA, INC.
- David L. Barron
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Echo canceler circuit and method
- Publication number 20050129224
- Publication date Jun 16, 2005
- MOTOROLA, INC.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Double talk activity detector and method for an echo canceler circuit
- Publication number 20050129225
- Publication date Jun 16, 2005
- MOTOROLA, INC.
- James B. Piket
- H04 - ELECTRIC COMMUNICATION TECHNIQUE