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| Patents for Joseph F. Keller | |||||
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| Number | Date | Patentee | Title | Type | |
| D51,900 | Mar. 26, 1918 | J.F. Keller | Design for a tracer and cutter frame for die-sinking machines | die sinkers | |
| D53,073 | Mar. 11, 1919 | J.F. Keller | Design for a standard for die-sinking machines | die sinkers | |