| 1941 METCALF Mounting Of Airscrew Blades Patent |
| 1892 BLADES Baseball Pitching Machine Patent 6660 |
| 1901 PILLING Design Blades Speculum Blank Patent 32610 |
| 1901 PILLING Blank Speculum Blades Handle Patent 32609 |
| 1950 GUSTAV Propeller Blades Patent Print Art |
| 1933 KONTOS Propeller Novel Shaped Blades Patent 19245 |
| 1902 PILLING Blank Speculum Blades Design Patent 32617 |
| 1963 MAX REICHELT Propeller Blades Patent Print |
| 1901 PILLING Speculum Blades Blank Patent 32612 |
| 1965 ISADORE Curved Rotor Blades Patent Print |
| 1962 CHARLES Tip Guard For Skate Blades Patent |
| 1952 CONWELL Ribbed Core For Steel Blades Patent |
| 1967 HILL Multi Purpose Tongue Blades WECK Patent 33486 |
| 1901 PILLING Speculum Blades Blank GEORGE Patent 32613 |
| 1928 NIXON Hub For Propeller Blades Patent Print |
| 1901 PILLING Design Blank Speculum Blades Patent 32611 |
| 1841 SIMONDS Machine For Scythe Blades Patent 11846 |
| 1947 LAMPTON Balancing Propeller Blades Patent |
| 1986 TROTTER Light Arrow Tip Twin Blades Patent 29937 |
| 1943 MORSE Protection Of Propeller Blades Patent |
| 1930 BRANCH Protector For Skate Blades Patent |
| 1950 GUSTAV MEIER Propeller Blades Patent Print |
| 1902 PILLING Speculum Blades Blank GEORGE Patent 32619 |
| 1901 PEDRETTI Design Ear Speculum Blades Patent 32607 |
| 1949 PLANERT Protector For Skate Blades Patent |
| 1901 PILLING Blank Speculum Blades Design Patent 32608 |