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| Patents for Place Gas Engine Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 322,477 | Jul. 21, 1885 | J.F. Place | Gas Engine | gas and gasoline engines | |
| 328,970 | Oct. 27, 1885 | J.F. Place | Gas Engine | gas and gasoline engines | |