Granted Patent
Utility
US 5,990,652 · App. 08/743,607
Swing system for a surface mining shovel
Inventor:
Charles J. Meisner
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Nov 4, 1996
Inventor
Charles J. Meisner
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.