Granted Patent
Utility
US 5,752,334 · App. 08/752,457
Dumping system for a dragline bucket
Inventor:
Darryl R. Immel
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Nov 15, 1996
Inventor
Darryl R. Immel
Assignee (at issue)
Harnischfeger 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.