Granted Patent
Utility
US 5,415,586 · App. 08/153,379
Combine harvester leveling system, combine harvester header adjusting system, and pivoting chain drive system
Inventors:
Raymond A. Hanson, Robert L. Bird, Kenneth A. Pfaff
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Nov 17, 1993
Inventors
Raymond A. Hanson
Robert L. Bird
Kenneth A. Pfaff
Assignee (at issue)
R. A. Hanson Company, Inc.
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.