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