Granted Patent
Utility
US 4,841,657 · App. 07/191,697
Smooth bore firearm having axially rotatable barrel
Inventor:
Alan I. Mossberg
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: May 9, 1988
Inventor
Alan I. Mossberg
Assignee (at issue)
O.F. MOSSBERG & SONS, 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.