Granted Patent
Utility
US 4,373,738 · App. 06/369,933
Steerable auxiliary wheel assembly for vehicles
Inventor:
Dennis Lange
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Apr 19, 1982
Inventor
Dennis Lange
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.