Granted Patent
Utility
US 4,397,134 · App. 06/312,029
Row crop attachment with sweeper chain
Inventors:
H. Nevin Lausch, Edward H. Priepke
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Oct 16, 1981
Inventors
H. Nevin Lausch
Edward H. Priepke
Assignee (at issue)
Sperry Corp.
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.