| 1921 FESSENDEN Method Destroying Enemy Gun Positions |
| 1921 UNION Method Shaping Seaming Garments Art |
| 1921 WALTER HADDON Method Means Actuating Gun Triggers |
| 1921 MCLEAN Method Steering Vessels Art Print |
| 1921 RICHARDSON Method Fireproofing Aircraft Parts |
| 1921 SCHOOLEY Method Making Railway Signal Torpedoes |
| 1921 DE Method Recovering Sunken Vessels Art |
| 1921 IGNATIUS Method Making Piano Hammers Art |
| 1921 LEO Camisole And Method Of Making Same |
| 1921 STODDARD Method Of Recording Music Patent |
| 1921 HUDSON Method Mechanism Exploding Submarine Mines |
| 1921 SMITH Method Building Reinforced Concrete Ships |
| 1921 TORSTEN Method Loading Detonating Caps Art |
| 1921 JAMES Violin Method Producing Same Art |
| 1921 HAMMOND Radio Controlled Method Patent 10670 |
| 1921 GOGU Method Means Actuating Gun Triggers |
| 1921 UNITED Method Mechanism Sewing Reverse Purl |
| 1921 JOSEPH Method Mechanism Sewing Reverse Purl |
| 1921 COFFIN Method Making Aerofoils Like Art |
| 1921 OTTO Method Making Piano Hammers Art Print |
| 1921 JOSEPH Method Shaping Seaming Garments Art |