David Westergaard

Person

Calgary, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Key telephone system without common control
- Patent number 6,088,362
- Issue date Jul 11, 2000
- Nortel Networks Corporation
- Robert Turnbull
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system without common control
- Patent number 6,072,826
- Issue date Jun 6, 2000
- Nortel Networks Corporation
- Robert Turnbull
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system without common control
- Patent number 6,046,995
- Issue date Apr 4, 2000
- Nortel Networks Corporation
- Robert Turnbull
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Remote answering of doorbell
- Patent number 5,966,432
- Issue date Oct 12, 1999
- Nortel Networks Corporation
- Brian Lawrence Buckler
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber equipment muting method and apparatus
- Patent number 5,805,687
- Issue date Sep 8, 1998
- Northern Telecom Limited
- David Jeffrey Westergaard
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system without common control
- Patent number 5,787,115
- Issue date Jul 28, 1998
- Northern Telecom Limited
- Robert Turnbull
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for removing FSK in-band signaling
- Patent number 5,768,367
- Issue date Jun 16, 1998
- Northern Telecom Limited
- David Jeffrey Westergaard
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Distribution automation smart remote terminal unit
- Patent number 5,237,511
- Issue date Aug 17, 1993
- Westronic, Inc.
- Kenneth J. Caird
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Scalable base station architecture
- Publication number 20020123365
- Publication date Sep 5, 2002
- Walter R. Thorson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

David Westergaard

Person

Patents Grantslast 30 patents

Key telephone system without common control

Key telephone system without common control

Key telephone system without common control

Remote answering of doorbell

Subscriber equipment muting method and apparatus

Key telephone system without common control

Method and apparatus for removing FSK in-band signaling

Distribution automation smart remote terminal unit

Patents Applicationslast 30 patents

Scalable base station architecture