Granted Patent
Utility
US 4,436,574 · App. 06/449,135
Radial mandrel
Inventors:
Robert Long, Richard K. Peters
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Dec 13, 1982
Inventors
Robert Long
Richard K. Peters
Assignee (at issue)
Eagle-Picher Industries, 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.