Granted Patent
Utility
US 6,650,649 · App. 09/359,832
Extension interface units in a communication system
Inventors:
Tariq Muhammad, Mike S. Lohman
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jul 23, 1999
Inventors
Tariq Muhammad
Mike S. Lohman
Assignee (at issue)
HUGHES ELECTRONICS LIMITED
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.