Granted Patent
Utility
US 5,515,433 · App. 08/298,146
Resistance forward telephone line feed circuit
Inventor:
William Chen
Patented Case
View Patent ↗
Granted: May 7, 1996
Filed: Aug 30, 1994
Inventor
William Chen
Assignee (at issue)
Reltec 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.