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| Patents for Stephen B. Gray | |||||
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| Number | Date | Patentee | Title | Type | |
| 556,346 | Mar. 17, 1896 | S.B. Gray | Traction Engine | steam traction engines | |
| 608,517 | Aug. 02, 1898 | S.B. Gray | Traction Engine | traction engine propulsion components | |