Granted Patent
Utility
US 6,588,521 · App. 09/277,364
Four track crawler crane
Inventors:
Kenneth J. Porubcansky, David J. Pech, Alan E. Pleuss
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Mar 26, 1999
Inventors
Kenneth J. Porubcansky
David J. Pech
Alan E. Pleuss
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.