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| Patents for Joseph A. Miller | |||||
| Number | Date | Patentee | Title | Type | |
| 1,333,943 | Mar. 16, 1920 | F. Spalding | Caliper | measurement gauges | |
| 1,337,165 | Apr. 13, 1920 | L.D. Spence | Caliper | measurement gauges | |