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| Patents for George G. Mc Lauthlin & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 134,548 | Jan. 07, 1873 | J.C. Hoadley | Check-Valves | steam check valves | |
| 143,574 | Oct. 14, 1873 | J.C. Hoadley | Dead-Lights for Steam-Boilers | low water alarms | |
| 144,098 | Oct. 28, 1873 | J.C. Hoadley | Governors for Steam-Engines | steam engine governors | |
| 148,560 | Mar. 17, 1874 | J.C. Hoadley | Governors for Steam-Engines | steam engine governors | |