Granted Patent
Utility
US 4,938,678 · App. 07/254,179
Adjustable clamp frames for thermo form machine
Inventor:
James N. Oulman
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Oct 6, 1988
Inventor
James N. Oulman
Assignee (at issue)
Winnebago 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.