Granted Patent
Utility
US 4,432,499 · App. 06/216,134
Portable feed grinder-mixer
Inventors:
Larry L. Henkensiefken, Douglas L. Pettit, Gerald E. Barry
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Dec 15, 1980
Inventors
Larry L. Henkensiefken
Douglas L. Pettit
Gerald E. Barry
Assignee (at issue)
Owatonna Manufacturing 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.