Granted Patent
Utility
US 4,979,722 · App. 07/449,534
Butterfly actuator
Inventor:
Roger W. Totten
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Dec 12, 1989
Inventor
Roger W. Totten
Assignee (at issue)
Adolph Coors Company
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.