Granted Patent
Utility
US 6,643,266 · App. 09/448,669
Method for qualifying a loop for DSL service
Inventor:
John T. Pugaczewski
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Nov 24, 1999
Inventor
John T. Pugaczewski
Assignee (at issue)
Qwest Communications International Inc.
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.