Granted Patent
Utility
US 5,332,250 · App. 07/997,672
Pintle hook
Inventors:
Gregory R. Thorwall, Gerald W. Hungerink
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Dec 28, 1992
Inventors
Gregory R. Thorwall
Gerald W. Hungerink
Assignee (at issue)
Holland Hitch Company
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.