Granted Patent
Utility
US 3,945,633 · App. 05/381,870
Hopper loader
Inventor:
Arthur A. Knopp
Patented Case
View Patent ↗
Granted: Mar 23, 1976
Filed: Jul 23, 1973
Inventor
Arthur A. Knopp
Assignee (at issue)
Harris-Intertype Corporation
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.