Granted Patent
Utility
US 4,226,212 · App. 06/038,090
Animal holding gate with automatic closing operation
Inventor:
Marvin J. Priefert
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: May 11, 1979
Inventor
Marvin J. 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.