Granted Patent
Utility
US 4,137,697 · App. 05/778,892
Bale density structure for cylindrical balers
Inventors:
William H. Knapp, Carmen S. Phillips, Walter A. Anderson
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: Mar 18, 1977
Inventors
William H. Knapp
Carmen S. Phillips
Walter A. Anderson
Assignee (at issue)
International Harvester 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.