Granted Patent
Utility
US 4,237,991 · App. 05/967,610
Self-propelled lawn mower
Inventor:
Eugene H. Schlapper
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Dec 8, 1978
Inventor
Eugene H. Schlapper
Assignee (at issue)
Outboard Marine Corporation
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.