Granted Patent
Utility
US 4,384,913 · App. 06/319,575
Mandrel for filament winding of plastic articles
Inventors:
William R. Dana, Ralph Friedrich, John D. McKenney
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Nov 9, 1981
Inventors
William R. Dana
Ralph Friedrich
John D. McKenney
Assignee (at issue)
Ameron, 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.