AMERITECH CORPORATION, A DELAWARE CORPORATION

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HOFFMAN ESTATES, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for transmitting a message to a telephone station
- Patent number 7,233,652
- Issue date Jun 19, 2007
- Ameritech Corp.
- Susanne Marie Crockett
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for canceling unwanted telephone calls
- Patent number 6,453,019
- Issue date Sep 17, 2002
- Ameritech Corp.
- Teresa Farias Latter
- H04 - ELECTRIC COMMUNICATION TECHNIQUE