Granted Patent
Utility
US 4,284,428 · App. 06/201,891
Separation of contaminant material from copper wire and cable
Inventor:
Everett J. Canning, Jr.
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Oct 29, 1980
Inventor
Everett J. Canning, Jr.
Assignee (at issue)
Western Electric Company, 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.