Granted Patent
Utility
US 4,604,858 · App. 06/620,963
Plunger cleanout apparatus for underfed crop baler
Inventors:
Edward W. Esau, Howard J. Ratzlaff
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Jun 15, 1984
Inventors
Edward W. Esau
Howard J. Ratzlaff
Assignee (at issue)
Hesston 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.