Granted Patent
Utility
US 4,999,021 · App. 07/419,162
Device for unloading containers
Inventor:
Ulrich Reissmann
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Oct 10, 1989
Inventor
Ulrich Reissmann
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.