US Patent: 461,161
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| Rotary Steam Engine
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Patentees:
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| Frederick Meyer (exact or similar names) - Englewood, Cook County, IL |
| Joseph S. Kiehl (exact or similar names) - Chicago, Cook County, IL |
| Alexander Grant (exact or similar names) - Riverdale, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 06, 1889 |
| Granted: |
Oct. 13, 1891 |
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Joel Havens
"Vintage Machinery" entry for Duplex Rotary Engine Co.
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Description: |
| Application renewed, 16 Mar. 1891. |
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