Granted Patent
Utility
US 5,791,809 · App. 08/842,072
Dragline with improved pin-retaining structure
Inventor:
Jay C. Bessey
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Apr 24, 1997
Inventor
Jay C. Bessey
Assignee (at issue)
Harnischfeger Technologies, 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.