David Elderfield

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Antenna connector and method for making an electrical device
- Patent number 5,929,815
- Issue date Jul 27, 1999
- Sierra Wireless, Inc.
- David Elderfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Liquid crystal display and reflective diffuser therefor including a...
- Patent number 5,166,815
- Issue date Nov 24, 1992
- NovAtel Communications, Ltd.
- David V. Elderfield
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Biometric document authentication system
- Publication number 20040003295
- Publication date Jan 1, 2004
- David Elderfield
- G07 - CHECKING-DEVICES