| 1922 AUTO ORDNANCE CORP Breech Mechanism Guns |
| 1941 WILLIAM Breech Closure For Guns Patent |
| 1922 TALIAFERRO Breech Mechanism For Guns Patent |
| 1929 MCCANN Breech Mechanism For Guns Patent |
| 1952 FRED Ramming Mechanism Breech Loading Guns |
| 1947 CORNETT Breech Mechanism Machine Guns Art |
| 1957 VICTOR Ejector Rotating Breech Automatic Guns |
| 1958 DAVID Breech Mechanisms Open Chamber Guns |
| 1922 EICKHOFF Breech Closure For Guns Patent |
| 1921 TATTNALL Mechanism Non Recoil Breech Loading Guns |
| 1928 KARL Breech Sight Ordnance Machine Guns Art |
| 1921 JOHN Semi Automatic Breech Mechanism Guns |
| 1930 MCCANN Breech Structure Of Guns Patent |
| 1922 GERARD Breech Lock For Machine Guns Patent |
| 1948 GOODHUE Safety Breech Loading Guns Art |
| 1958 DARDICK CORP Breech Mechanisms Open Chamber Guns |
| 1952 LEO Breech Mechanism Guns Having Replaceable Liner |
| 1956 HAWKINS Injector Pump Breech Cooling Guns |
| 1952 FINN Wear Plate Breech Mechanism Guns Art |
| 1922 AUTO ORDNANCE CORP Breech Closure Guns Art |
| 1961 THIERRY Self Energizing Breech Seal Guns |