Granted Patent
Utility
US 4,594,840 · App. 06/702,774
Pneumatic system for combine header height control
Inventors:
Werner Kruger D'Almeida, Oldemar Boeck
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: Feb 19, 1985
Inventors
Werner Kruger D'Almeida
Oldemar Boeck
Assignee (at issue)
Sperry Corp.
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.