Granted Patent
Utility
US 5,059,043 · App. 07/342,242
Blast joint for snubbing unit
Inventor:
Karl F. Kuhne
Patented Case
View Patent ↗
Granted: Oct 22, 1991
Filed: Apr 24, 1989
Inventor
Karl F. Kuhne
Assignee (at issue)
Vermont American Corporation
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.