IP Library › Granted Patent US 5,999,901
Granted Patent Utility
US 5,999,901 · App. 08/990,045

Telephone network apparatus and method using echo delay and attenuation

Inventors: Curtis Dean Knittle, Paul D. Jaramillo, Frank H. Wu
Patented Case View Patent ↗
Granted: Dec 7, 1999 Filed: Dec 12, 1997
Inventors
Curtis Dean Knittle
Paul D. Jaramillo
Frank H. Wu
Assignees (at issue)
MediaOne Group, Inc.
U S West, 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,999,901
App. No.
08/990,045
Filed
1997-12-12
Granted
1999-12-07
Kind
A