Granted Patent
Utility
US 4,335,657 · App. 06/177,690
Ammunition round with retained piston
Inventor:
William R. Bains
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Aug 13, 1980
Inventor
William R. Bains
Assignee (at issue)
Ford Aerospace & Communications Corporation
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.