Granted Patent
Utility
US 6,690,774 · App. 09/953,997
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Inventors:
E-Lee Chang, Edward Michael Silver
Patented Case
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Granted: Feb 10, 2004
Filed: Sep 17, 2001
Inventors
E-Lee Chang
Edward Michael Silver
Assignee (at issue)
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.