Granted Patent
Utility
US 4,864,747 · App. 07/162,146
Support assembly for a dragline bucket
Inventors:
Paul Martin, Carl D. Swick
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Feb 29, 1988
Inventors
Paul Martin
Carl D. Swick
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.