Granted Patent
Utility
US 4,531,349 · App. 06/592,643
Rotary cutter for disc mower-conditioner
Inventors:
Philip J. Ehrhart, Stanley J. Makofka, Kenneth W. McLean
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Mar 23, 1984
Inventors
Philip J. Ehrhart
Stanley J. Makofka
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.