Grant E. Swinehart

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Naperville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for providing call tracing service
- Patent number 4,591,665
- Issue date May 27, 1986
- AT&T Bell Laboratories
- Robert W. Foster
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for providing a plurality of special services
- Patent number 4,567,323
- Issue date Jan 28, 1986
- AT&T Bell Laboratories
- Rosanna M. Lottes
- H04 - ELECTRIC COMMUNICATION TECHNIQUE