Granted Patent
Utility
US 4,635,897 · App. 06/717,585
Tube flow shut-off device
Inventor:
Ben J. Gallant
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Mar 29, 1985
Inventor
Ben J. Gallant
Assignee (at issue)
Airsonics License Partnership
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.