US Patent: 680,510
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| Rotary Engine
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Patentee:
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| Edward C. Warren (exact or similar names) - Chicago, Cook County, IL |
| USPTO Classifications: |
| 91/8 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 31, 1900 |
| Granted: |
Aug. 13, 1901 |
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Joel Havens
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Description: |
| Application renewed, 05 Feb., 1901. |
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