| 1920 VICKERS LTD Ordnance Firing Mechanism Art |
| 1920 AUTO ORDNANCE CORP Ammunition Lubrication |
| 1920 HOMER Automatic Electrically Fired Ordnance |
| 1920 AUTO ORDNANCE CORP Magazine Firearms Art |
| 1920 VICKERS LTD Recoil Ordnance Art Print |
| 1920 AUTO ORDNANCE CORP Gun Lubrication Patent |
| 1920 TREVOR Breech Loading Ordnance Patent Print |
| 1920 SCOTT Ordnance Art |
| 1920 PAYNE OSCAR Gun AUTO ORDNANCE CORP Patent |
| 1920 VICKERS LTD Sighting Use With Ordnance Art |
| 1920 AUTO ORDNANCE CORP Breech Closure Patent |
| 1920 VICKERS LTD Ordnance Recoil Run Out Art |
| 1920 AUTO ORDNANCE CORP Gun Patent Print Art |
| 1920 TREVOR Lock Mechanism Of Ordnance Patent |
| 1920 VICKERS LTD Firing Mechanism Ordnance Art |
| 1920 TREVOR Recoil Apparatus Of Ordnance Patent |
| 1920 AUTO ORDNANCE CORP Ordnance Patent Print |
| 1920 AUTO ORDNANCE CORP Gun Magazine Patent |
| 1920 AUTO ORDNANCE CORP Firearm Patent Print Art |
| 1920 LEONARDO Recoll Operated Ordnance Patent |
| 1920 VICKERS LTD Breech Loading Ordnance Patent |
| 1920 US ORDNANCE COMPANY Gun Structure Patent |
| 1920 LOUIS BOURDELLES Ordnance DELAUNAY BELLEVILLE ETS |
| 1920 DELAUNAY BELLEVILLE ETS Ordnance Patent |
| 1920 TREVOR Ordnance Firing Mechanism Patent |
| 1920 VICKERS LTD Ordnance Breech Mechanism Art |
| 1920 AUTO ORDNANCE CORP Magazine Patent Print |
| 1920 WILLIAM S PEIRCE Ordnance Patent Print Art |
| 1920 AUTO ORDNANCE CORP Gun Element Patent Print |
| 1920 TUNKS CHARLES Magazine AUTO ORDNANCE CORP |
| 1920 FISHER LESLIE Ordnance AUTO ORDNANCE CORP |
| 1920 TREVOR Firing Mechanism Of Ordnance Patent |
| 1920 VICKERS LTD Lock Mechanism Ordnance Art |
| 1920 GAY WILLIAM Ordnance Device Patent Print |
| 1920 AUTO ORDNANCE CORP Lubricating Ammunition |
| 1920 US GOVERNMENT Ordnance Patent Print Art |
| 1920 TREVOR Ordnance Recoil Run Out Art Print |
| 1920 AUTO ORDNANCE CORP Gun Mechanism Patent |
| 1920 TREVOR Breech Mechanism Of Ordnance Patent |
| 1920 MUIR DORA Ordnance US GOVERNMENT Patent |
| 1920 AUTO ORDNANCE CORP Breech Lubrication Art |
| 1920 TREVOR Ordnance Breech Mechanism Patent |
| 1920 TREVOR Sighting Use With Ordnance Art Print |
| 1920 TREVOR Recoil Run Out Gear Ordnance Art |
| 1920 VICKERS LTD Recoil Run Out Gear Ordnance |
| 1920 US ORDNANCE Breech Mechanism Ordnance Art |
| 1920 AUTO ORDNANCE CORP Cartridge Magazine Art |