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| All Patents in class 91/352 | |||||
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| Number | Date | Patentee | Title | Type | |
| 10,647 | Mar. 14, 1854 | A. Taylor | Steam Engine Faucet-Valve | steam engine valves | |
| 208,565 | Oct. 01, 1878 | J. Butcher | Rotary- Engine | rotary steam engines | |
| 2,612,868 | Oct. 07, 1952 | R.P. Fitzgerald | Pneumatic drop hammer | drop hammers | |
| 2,635,396 | Apr. 21, 1953 | H.R. Johnson | Portable rubbing machine | handheld power sanders | |