Granted Patent
Utility
US 4,433,530 · App. 06/422,152
Interlock mechanism preventing engine starting when a mower is in power drive
Inventor:
Daniel Schaefer
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Sep 23, 1982
Inventor
Daniel Schaefer
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.