| 1921 CHARLES Breech Block Mechanism Patent Print |
| 1928 TREVOR Breech Loading Ordnance Patent Print |
| 1920 TREVOR Breech Loading Ordnance Patent Print |
| 1952 WELLS Air Gun Breech Magazine Patent Print |
| 1920 PAYNE OSCAR Breech Lubrication Patent Print |
| 1927 ESSEN PIETER Breech Mechanism Patent Print |
| 1931 FRITZ HERLACH Breech Closure Patent Print |
| 1924 STAMBAUGH Breech Mechanism Patent Print Art |
| 1946 WILLIAM Breech Block Mechanism Patent Print |
| 1922 ASBURY DORSEY Breech Closure Patent Print |
| 1922 ASBURY DORSEY Breech Mechanism Patent Print |
| 1922 FROST ASBURY Breech Closure Patent Print |
| 1920 GRANT HAMMOND Breech Bolt Stop Patent Print |
| 1923 TOM Breech Closing Mechanism Patent Print |
| 1920 STAMBAUGH Breech Mechanism Patent Print Art |
| 1962 WALTON Self Ejecting Breech Patent Print |
| 1957 BERTIL Breech Block For A Gun Patent Print |
| 1960 WALTON Self Ejecting Breech Patent Print |
| 1958 STERN Breech Block Mechanism Patent Print |
| 1933 JOSEPH Breech Loading Ordnance Patent Print |
| 1961 GRANDY Recoilless Rifle Breech Patent Print |
| 1959 MULNO Breech Release Mechanism Patent Print |
| 1932 DOMENICO Breech Loading Gun Patent Print |
| 1957 WILLHAUCK Breech Mechanisms Patent Print |
| 1920 GRAHAM OLIVER Breech Closure Patent Print |
| 1925 DAVID LUCAS Breech Loading Gun Patent Print |
| 1958 LORD JOHN Split Breech Block Patent Print |
| 1921 SEARLE Breech Loading Firearm Patent Print |