Granted Patent
Utility
US 5,636,460 · App. 08/529,868
Dragline with cantilevered side-access dump block
Inventor:
Andrew P. Dretzka
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Sep 18, 1995
Inventor
Andrew P. Dretzka
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.