Granted Patent
Utility
US 5,592,439 · App. 08/393,721
Self-centering dual shuttle air gun
Inventors:
E. R. Harrison, Philip J. Jenkins
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Feb 24, 1995
Inventors
E. R. Harrison
Philip J. Jenkins
Assignee (at issue)
I/O Exploration Products (U.S.A.), 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.