Donald B. Vaello

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San Antonio, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for reverse billing of a telephone call
- Patent number 6,639,977
- Issue date Oct 28, 2003
- Evercom Systems, Inc.
- Bobb Swope
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for affecting inmate conduct with good behavior d...
- Patent number 6,636,591
- Issue date Oct 21, 2003
- Evercom Systems, Inc.
- Bobb Swope
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone display
- Patent number 4,797,914
- Issue date Jan 10, 1989
- North American Industries, Inc.
- Donald B. Vaello
- H04 - ELECTRIC COMMUNICATION TECHNIQUE