Anthony P. Shen

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Ontario, CA

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Patents Grantslast 30 patents

Information Patent Grant
Extension-in-use exclusion apparatus
- Patent number 6,061,438
- Issue date May 9, 2000
- Aastra Technologies Inc
- Francis N. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for supporting spontaneous call waiting identi...
- Patent number 5,812,649
- Issue date Sep 22, 1998
- Aastra Aerospace Inc.
- Anthony P. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interrupted tone converter
- Patent number 5,764,758
- Issue date Jun 9, 1998
- Aastra Aerospace Inc.
- Anthony P. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call waiting cancellation device
- Patent number 5,546,451
- Issue date Aug 13, 1996
- Aastra Technologies Inc.
- Anthony P. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Audio caller identification unit
- Patent number 5,481,594
- Issue date Jan 2, 1996
- Aastra Corporation
- Francis N. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE