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Roger W. Ratz
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Naperville, IL, US
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last 30 patents
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Patent Grant
Personal computer interactive phone system
Patent number
6,310,940
Issue date
Oct 30, 2001
NCR Corporation
Roger W. Ratz
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
State machine and method for monitoring and controlling operating m...
Patent number
5,848,136
Issue date
Dec 8, 1998
NCR Corporation
Roger W. Ratz
H04 - ELECTRIC COMMUNICATION TECHNIQUE