Granted Patent
Utility
US 6,160,874 · App. 08/956,220
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Inventors:
Robert Frank Dickerman, George Kult
Patented Case
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Granted: Dec 12, 2000
Filed: Oct 21, 1997
Inventors
Robert Frank Dickerman
George Kult
Assignee (at issue)
MCI Communications 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.