Granted Patent
Utility
US 5,520,443 · App. 08/334,600
Series hydraulic circuit tailgate locking mechanism
Inventor:
Jerald G. Zanzig
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Nov 4, 1994
Inventor
Jerald G. Zanzig
Assignee (at issue)
The Heil 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.