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| All Patents in class 165/DIG.183 | |||||
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| Number | Date | Patentee | Title | Type | |
| 552,095 | Dec. 31, 1895 | J.T. Dickson, E. Bretney | Gas-generator | ||
| 560,081 | May 12, 1896 | E. Bretney | Device for generating ammonia-gas | ||