Granted Patent
Utility
US 4,897,942 · App. 07/257,798
High efficiency snowthrower
Inventors:
Kenneth H. Klas, Richard Brown
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Oct 14, 1988
Inventors
Kenneth H. Klas
Richard Brown
Assignee (at issue)
Simplicity Manufacturing, Inc.
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.