Granted Patent
Utility
US 4,604,969 · App. 06/745,201
Milking inflation including air vent
Inventor:
Leigh R. Larson
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Jun 17, 1985
Inventor
Leigh R. Larson
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.