Granted Patent
Utility
US 6,698,171 · App. 10/188,219
Tractor-supported lawnmower having mowers movable up and down
Inventor:
David A. Doerflinger
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Jul 1, 2002
Inventor
David A. Doerflinger
Assignee (at issue)
Textron 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.