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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for generating an audible tone in DSL environment
- Patent number 6,741,675
- Issue date May 25, 2004
- Turnstone Systems, Inc.
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Battery injection and loop supervision for DSL environment
- Patent number 6,292,540
- Issue date Sep 18, 2001
- Turnstone Systems, Inc.
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for generating an audible tone in DSL environment
- Publication number 20030179859
- Publication date Sep 25, 2003
- Turnstone Systems, Inc.
- Ramon C.W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE