| 1920 BADGER MFG CORP Automobile Bumper Patent |
| 1920 HASKELITE MFG CORP Aeroplane Patent Print |
| 1920 AUTO ORDNANCE CORP Gun Lubrication Patent |
| 1920 ATLANTIC HAND BRAKE CORP Hand Brake Patent |
| 1920 PAYNE OSCAR Gun AUTO ORDNANCE CORP Patent |
| 1920 AUTO ORDNANCE CORP Breech Closure Patent |
| 1920 AUTO ORDNANCE CORP Gun Patent Print Art |
| 1920 AUTO ORDNANCE CORP Ordnance Patent Print |
| 1920 AUTO ORDNANCE CORP Gun Magazine Patent |
| 1920 MARLIN ROCKWELL CORP Automatic Gun Patent |
| 1920 AUTO ORDNANCE CORP Firearm Patent Print Art |
| 1920 COWMATIC CORP Animal Stanchion Patent Print |
| 1920 CARBURETOR LOCK CORP Carbureter Lock Patent |
| 1920 AUTO ORDNANCE CORP Magazine Patent Print |
| 1920 WATSON PRODUCTS CORP Hand Sled Patent Print |
| 1920 AUTO ORDNANCE CORP Gun Element Patent Print |
| 1920 COWMATIC CORP Manger Partition Patent Print |
| 1920 AMERICAN RIDES CORP Amusement Device Patent |
| 1920 AUTOMOTIVE TRACTOR CORP Autotractor Patent |
| 1920 GEN AMERICAN TANK CAR CORP Tank Car Patent |
| 1920 AUTO ORDNANCE CORP Gun Mechanism Patent |
| 1920 COWMATIC CORP Stanchion Support Patent |
| 1920 MARLINROCKWELL CORP Gun Mount Patent Print |
| 1920 HASKELITE MFG CORP Aeroplane Body Patent |
| 1920 SIMPLEX CORP Lock For Motor Vehicles Patent |
| 1920 SIMPLEX CORP Motor Vehicle Lock Patent |