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| Patents for Johan Stumpf | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,045,630 | Nov. 26, 1912 | J. Stumpf | Unidirectional-flow steam-engine | steam engines | |
| 1,668,927 | May 08, 1928 | J. Stumpf | Noncondensing steam engine | steam engines | |