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| All Patents in class 145/50 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,208,489 | Sep. 28, 1965 | J.L. Filer, G.L. Walker | Phillips head screw starter | screwdriver bits and holders | |
| 3,288,184 | Nov. 29, 1966 | S. Kyser | Phillips head screw starter | screwdriver bits and holders | |