Granted Patent
Utility
US 6,269,635 · App. 09/233,927
Control and hydraulic system for a liftcrane
Inventor:
Arthur G. Zuehlke
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Jan 20, 1999
Inventor
Arthur G. Zuehlke
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.