Granted Patent
Utility
US 5,636,459 · App. 08/384,110
Dragline including improved boom
Inventor:
Joseph L. Huffman
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Feb 3, 1995
Inventor
Joseph L. Huffman
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.