| 1960 OLIN MATHIESON Gun Barrel Patent Print Art |
| 1956 GUSTAV TILLANDER Gun Barrel Patent Print |
| 1944 FAY WALTER Gun Barrel Patent Print Art |
| 1960 WALTON Cascaded Gun Barrel Patent Print Art |
| 1964 GROOVER Auxiliary Gun Barrel Patent Print |
| 1958 CRANE CO Gun Barrel Liner Patent Print Art |
| 1927 EMILIEN METHLIN Gun Barrel Patent Print Art |
| 1926 JONES LAWRENCE Gun Barrel Patent Print Art |
| 1944 VINSON Air Cooled Gun Barrel Patent Print |
| 1922 MCCANNA Gun Barrel Cleaner Patent Print Art |
| 1933 KESSENICH Composite Gun Barrel Patent Print |
| 1952 BOFORS AB Artillery Gun Barrel Patent Print |
| 1924 ADAMSON KEITH Gun Barrel Patent Print Art |
| 1941 HOGG Gun Barrel Construction Patent Print |
| 1956 BOFORS AB Gun Barrel Patent Print Art |
| 1952 HJALMAR Artillery Gun Barrel Patent Print |
| 1925 CHARLES Gun Barrel Cleaner Patent Print Art |
| 1944 SCHIRGUN CORP Gun Barrel Lock Patent Print |
| 1923 WILHELM HEINE Gun Barrel Patent Print Art |
| 1920 TALIAFERRO THOMPSON Gun Barrel Patent Print |
| 1958 COTTERMAN Gun Barrel Liner Patent Print Art |
| 1931 PEDERSEN JOHN Gun Barrel Patent Print Art |
| 1927 MEDEARIS COLUMBUS Gun Barrel Patent Print |
| 1944 WOLDEMAR BORN Gun Barrel Patent Print Art |
| 1963 ROBINSON Rifled Gun Barrel Patent Print Art |
| 1948 SWEBILIUS CARL Gun Barrel Lock Patent Print |
| 1960 WILSON JOHN Gun Barrel Patent Print Art |
| 1945 VERA FRANCIS Gun Barrel Patent Print Art |
| 1923 KRUPP AG Gun Barrel Patent Print Art |