John A. Washburn

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Aurora, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
High density telephone network interface unit
- Patent number 5,907,614
- Issue date May 25, 1999
- Teltrend Inc.
- Eric Paul Bergstrom
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High density telephone network interface unit
- Patent number 5,631,956
- Issue date May 20, 1997
- Teltrend Inc.
- Eric P. Bergstrom
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High density telephone network interface unit
- Patent number 5,521,977
- Issue date May 28, 1996
- Teltrend Inc.
- Eric P. Bergstrom
- H04 - ELECTRIC COMMUNICATION TECHNIQUE