Granted Patent
Utility
US 6,025,686 · App. 08/899,468
Method and system for controlling movement of a digging dipper
Inventors:
Francis G. Wickert, Shu-Chieh Chang, Angela R. Halwas, David Lokhorst, Bryan D. Roy
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: Jul 23, 1997
Inventors
Francis G. Wickert
Shu-Chieh Chang
Angela R. Halwas
David Lokhorst
Bryan D. Roy
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.