Granted Patent
Utility
US 4,420,125 · App. 06/290,280
Collapsible reel
Inventors:
Manuel Martinez, Ronald P. Zelins
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: Aug 6, 1981
Inventors
Manuel Martinez
Ronald P. Zelins
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.