Alan R. Trefzger

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Sterling, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
System for integrating a stand alone inbound automatic call distrib...
- Patent number 5,544,220
- Issue date Aug 6, 1996
- EIS International, Inc.
- Alan R. Trefzger
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System for integrating a stand alone inbound automatic call distrib...
- Patent number 5,425,093
- Issue date Jun 13, 1995
- International Telesystems Corporation
- Alan R. Trefzger
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of randomizing telephone numbers
- Patent number 4,741,028
- Issue date Apr 26, 1988
- International Telesystems Corporation
- James J. Frimmel
- H04 - ELECTRIC COMMUNICATION TECHNIQUE