Granted Patent
Utility
US 4,753,301 · App. 06/916,161
Well perforating gun assembly
Inventor:
William J. Berry
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Oct 7, 1986
Inventor
William J. Berry
Assignee (at issue)
Titan Specialties, Ltd.
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.