Granted Patent
Utility
US 4,424,740 · App. 06/329,337
Compactor safety interlock mechanism
Inventors:
Kenneth W. Gwathney, George K. Carpenter
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Dec 10, 1981
Inventors
Kenneth W. Gwathney
George K. Carpenter
Assignee (at issue)
Marathon Equipment Company
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.