| 1921 AUTOMATIC APPLIANCE Signal Mechanism Art |
| 1921 UNION Feeding Mechanism Sewing Machines Art |
| 1921 SCOTT Strip Cutting Sewing Mechanism Art |
| 1921 UNION Strip Cutting Sewing Mechanism Art |
| 1921 SAMUEL Driving Mechanism Locomotives Art |
| 1921 GUSTAFSON Sheet Controlling Mechanism Art |
| 1921 DE Trimming Mechanism Sewing Machines Art |
| 1921 HOHMANN Rotary Hook Sewing Mechanism Art |
| 1921 ARBETTER Thread Delivering Mechanism Art |
| 1921 HOLMES Floating Piston Recoil Mechanism Art |
| 1921 MACE Driving Mechanism Sewing Machines Art |
| 1921 SINGER CO Buttonhole Cutting Mechanism Art |
| 1921 DYER Elevating Mechanism Shop Trucks Art |
| 1921 ESHEL Valve Mechanism Art |
| 1921 JAMES Propelling Mechanism Vessels Art |
| 1921 SCHULZ M Sheet Controlling Mechanism Art |
| 1921 BLACKBURN Indicating Mechanism Game Art |
| 1921 DE Feeding Mechanism Sewing Machines Art |
| 1921 HAYES Feeding Mechanism Sewing Machines Art |
| 1921 CONNECTICUT Time Controlled Mechanism Art |
| 1921 KAUP Discharge Door Operating Mechanism Art |
| 1921 BALCH Hand Setting Mechanism Timepieces Art |
| 1921 SMALL Propelling Mechanism Patent Print Art |
| 1921 JOSEPH Brake Mechanism For Railway Cars Art |
| 1921 NEWTON D BAKER Recoil Mechanism Guns Art |
| 1921 BUDA Elevating Mechanism Shop Trucks Art |
| 1921 YARROW Steering Mechanism Patent Print Art |
| 1921 BERRY Tilting Mechanism Dumping Bodies Art |