Granted Patent
Utility
US 5,109,802 · App. 07/670,886
Animal headgate with an automatic locking mechanism
Inventor:
William D. Priefert
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Mar 18, 1991
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.