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| All Patents in class 91/508 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,293,713 | Feb. 11, 1919 | H.A. Chuse | Steam Engine | steam engine valves | |
| 1,684,729 | Sep. 18, 1928 | R.J. Denio | Automobile elevating apparatus | vehicle mechanic | |
| 2,400,996 | May 28, 1946 | L. Iversen | Metal Shear | metal shearing machines | |