Granted Patent
Utility
US 4,620,069 · App. 06/677,438
Method and apparatus to determine whether a subscriber line is loaded or non-loaded
Inventors:
William R. Godwin, Salvatore Quattrocchi
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Dec 3, 1984
Inventors
William R. Godwin
Salvatore Quattrocchi
Assignee (at issue)
ITT 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.