Patents by Inventor Maria Hemmer

Maria Hemmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6009321
    Abstract: A system and method for tracing calls, such as those terminating in a wireless telephone system, is disclosed. The system is part of a communication network that uses a switch connected to a caller. The switch extracts information about the caller such as a calling party number and other information useful for tracing the call. Once the information has been extracted, the switch sends the information to a storage device associated with the called party, such as a home location register. The storage device creates a log of the call, storing all the extracted information. When the call is to be traced, a device capable of accessing the storage device can easily retrieve the stored information and thereby identify and locate the caller.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: December 28, 1999
    Assignee: Northern Telecom Limited
    Inventors: Jin Wang, Maria Hemmer, Yahya Idrissi, David Wilding