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Markus Lehmacher
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Stuttgart, DE
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last 30 patents
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Patent Grant
Method of establishing a toll-free communication connection, as wel...
Patent number
6,343,123
Issue date
Jan 29, 2002
Alcatel
Markus Lehmacher
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Telecommunication system, and switching means, and memory means, an...
Patent number
6,028,918
Issue date
Feb 22, 2000
Alcatel
Markus Lehmacher
H04 - ELECTRIC COMMUNICATION TECHNIQUE