| 1920 BLACKLOCK Method Of Controlling Guns Patent |
| 1920 SCHNEIDER CIE Loading Guns Art Print |
| 1920 KRUPP AG Arrangement Track Railway Guns Art |
| 1920 EUGENE Apparatus For Aiming Guns Patent |
| 1920 GEORGE HAZELTON Firing Of Guns Patent Print |
| 1920 KRUPP AG Arrangement Rails Railway Guns Art |
| 1920 VICKERS LTD Sighting Device For Guns Patent |
| 1920 BROWNING Machine Filling Feed Belts Machine Guns |
| 1920 GORE Cartridge Magazine Rifles Machine Guns |
| 1920 RUDOLF Arrangement Track Railway Guns Art |
| 1920 EUGENE Varying Recoil Guns Art Print |
| 1920 EUGENE Aiming Guns On Armored Cars Other Purposes |
| 1920 SCHNEIDER CIE Sighting Guns Art Print |
| 1920 WALKER Shell For Machine Guns Patent Print |
| 1920 EUGENE Apparatus For Loading Guns Patent |
| 1920 SCHNEIDER CIE Aiming Guns Art Print Patent |
| 1920 VEEDER Indicator Magazine Guns War Patent 22388 |
| 1920 CURTIS Bolting Mechanism For Guns Patent |
| 1920 EUGENE Sighting Device For Guns Patent |
| 1920 KRUPP AG Turntable For Railway Guns Patent |
| 1920 SCHNEIDER CIE Varying Recoil Guns Art |
| 1920 EUGENE Hydraulic Brake For Guns Patent |
| 1920 TREVOR Sighting Anti Aircraft Guns Art |
| 1920 MESSERSMITH Tripod Mounting Guns &C Art |
| 1920 EUGENE Aiming Apparatus For Guns Patent |
| 1920 EUGENE SCHNEIDER Brake For Guns Patent |
| 1920 PAUL Arrangement Rails Railway Guns Art |
| 1920 SCHNEIDER CIE Hydraulic Brake Guns Art |
| 1920 VICKERS LTD Sighting Anti Aircraft Guns Art |
| 1920 SAUNDERS Mounting For Heavy Guns Patent |
| 1920 MCLEOD Light Attachment For Guns Patent |
| 1920 DAISY MFG COMPANY Lever Arm For Guns Patent |
| 1920 EUGENE Automatic Regulation Hydraulic Brakes Guns |
| 1920 ITHACA GUN CO Bolting Mechanism Guns Art |
| 1920 FRITZ Turntable For Railway Guns Patent |
| 1920 HUSSEY Indicator For Magazine Guns Patent |
| 1920 SCHNEIDER & CIE Brake For Guns Patent Print |
| 1920 ARTHUR C BROWN Mounting Heavy Guns Art |
| 1920 STRICKLAND Trigger Double Barrel Guns Art |
| 1920 WORKEN Flash Absorber Machine Guns Art |
| 1920 LEFEVER Lever Arm For Guns Patent Print Art |
| 1920 VEEDER Indicator Magazine Guns Art Print |
| 1920 ALFRED Foundation Guns With Wheeled Gun Carriages |
| 1920 EARLE F WATSON Adjustable Front Sight Guns |
| 1920 GEORGE Mount Stand Machine Guns Art Print |
| 1920 TREVOR Sighting Device For Guns Patent |
| 1920 NEWITT Adjustable Front Sight Guns Art |
| 1920 CRAIG ALVIN Buffer For Guns Patent Print |