Granted Patent
Utility
US 6,481,202 · App. 09/175,065
Hydraulic system for boom hoist cylinder crane
Inventors:
Arthur G. Zuehlke, Charles R. Wernecke, David J. Pech
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Oct 19, 1998
Inventors
Arthur G. Zuehlke
Charles R. Wernecke
David J. Pech
Assignee (at issue)
Manitowoc Crane Companies, LLC
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.