Granted Patent
Utility
US 6,286,615 · App. 09/531,565
Heavy vehicle for breaking up ground with retracting and steering rear wheels
Inventor:
Romolo Bitelli
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Mar 20, 2000
Inventor
Romolo Bitelli
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.