Granted Patent
Utility
US 5,428,909 · App. 08/119,643
Dump bucket arch
Inventor:
Darryl L. Immel
Patented Case
View Patent ↗
Granted: Jul 4, 1995
Filed: Sep 13, 1993
Inventor
Darryl L. Immel
Assignee (at issue)
Harnischfeger Industries, 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.