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| Patents for Joseph Day | |||||
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| Picture | Number | Date | Patentee | Title | |
| 543,614 | Jul. 30, 1895 | J. Day | Gas Engine | ||
| 544,214 | Aug. 06, 1895 | J. Day | Gas Engine | ||
| 661,599 | Nov. 13, 1900 | J. Day | Oil Engine | ||