Granted Patent
Utility
US 4,569,372 · App. 06/644,989
Remote valve operators
Inventor:
Leon Blank
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Aug 28, 1984
Inventor
Leon Blank
Assignee (at issue)
Commercial Shearing, 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.