Granted Patent
Utility
US 4,257,219 · App. 06/069,997
Cylindrical bale forming machine having hydraulic control means for controlling the bale density
Inventors:
Donald E. Burrough, Hallis D. Campbell, Dean E. Seefeld
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Aug 27, 1979
Inventors
Donald E. Burrough
Hallis D. Campbell
Dean E. Seefeld
Assignee (at issue)
Gehl Company
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.