Granted Patent
Utility
US 4,930,450 · App. 07/304,465
Livestock handling device
Inventor:
William D. Priefert
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Feb 1, 1989
Inventor
William D. Priefert
Assignee (at issue)
Priefert Mfg. Co, Inc.
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.