Granted Patent
Utility
US 5,368,121 · App. 08/078,344
Telescoping tractor frame
Inventor:
William D. Priefert
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Jun 21, 1993
Inventor
William D. Priefert
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.