Granted Patent
Utility
US 6,173,590 · App. 09/492,298
Skid steer lock
Inventor:
Bryan Witchey
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Jan 27, 2000
Inventor
Bryan Witchey
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.