Granted Patent
Utility
US 4,598,571 · App. 06/595,731
Control valve for a mandrel collection system
Inventor:
Richard W. Oefinger
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Apr 2, 1984
Inventor
Richard W. Oefinger
Assignee (at issue)
USM Holding AG
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.