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Helmut Rau
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Germering, DE
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last 30 patents
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Patent Grant
Telephone switching system and method
Patent number
6,560,464
Issue date
May 6, 2003
Siemens Aktiengesellschaft
Helmut Rau
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Process and system for automatic routing
Patent number
6,285,879
Issue date
Sep 4, 2001
Siemens Aktiengesellschaft
Gerhard Lechner
H04 - ELECTRIC COMMUNICATION TECHNIQUE