David W. Grimes

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Crownsville, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Power line telephony exchange
- Patent number 6,668,058
- Issue date Dec 23, 2003
- Telkonet Communications, Inc.
- David W. Grimes
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Power line telephony exchange
- Publication number 20010046288
- Publication date Nov 29, 2001
- David W. Grimes
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Methods and apparatus for providing telephonic communication services
- Publication number 20010033566
- Publication date Oct 25, 2001
- David W. Grimes
- H04 - ELECTRIC COMMUNICATION TECHNIQUE