Granted Patent
Utility
US 4,245,732 · App. 06/053,433
Compactly foldable radial luffing stacker
Inventor:
Egbert Couperus
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Jun 29, 1979
Inventor
Egbert Couperus
Assignee (at issue)
Allis-Chalmers Canada 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.