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| All Patents in class 165/121 | |||||
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| Number | Date | Patentee | Title | Type | |
| 92,490 | Jul. 13, 1869 | B.F. Sturtevant | Blast Apparatus | fans and blowers | |
| 100,240 | Feb. 22, 1870 | B.F. Sturtevant | Air Heater and Steam Condenser | steam condensers | |
| 100,241 | Feb. 22, 1870 | B.F. Sturtevant | Air Heater and Steam Condenser | steam condensers | |
| 100,242 | Feb. 22, 1870 | B.F. Sturtevant | Air Heater and Steam Condenser | steam condensers | |
| 1,450,032 | Mar. 27, 1923 | J.W. Gardner | Compressor mechanism | air compressors | |