Granted Patent
Utility
US 4,387,863 · App. 06/331,715
Spool assembly
Inventors:
Donald R. Edmonston, Frederick R. Weaver, Jr.
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Dec 17, 1981
Inventors
Donald R. Edmonston
Frederick R. Weaver, 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.