Granted Patent
Utility
US 6,674,729 · App. 09/546,785
Communications system for providing ATM connections and echo cancellation
Inventor:
Albert Daniel DuRee
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Apr 11, 2000
Inventor
Albert Daniel DuRee
Assignee (at issue)
SPRINT COMMUNICATIONS COMPANY, L.P.
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.