Granted Patent
Utility
US 4,441,821 · App. 06/400,140
Apparatus for increasing the delivery range of a mixing and delivery auger trough
Inventors:
George Burkhart, Martin F. Dohnalik
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Jul 20, 1982
Inventors
George Burkhart
Martin F. Dohnalik
Assignee (at issue)
Barber-Greene 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.