Granted Patent
Utility
US 4,567,716 · App. 06/592,644
Full quadrant crop lifter for disc mower-conditioners
Inventors:
Stanley J. Makofka, Philip J. Ehrhart, Kenneth W. McLean
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Mar 23, 1984
Inventors
Stanley J. Makofka
Philip J. Ehrhart
Kenneth W. McLean
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.