US Patent: 1,861,168
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| Rotary Engine
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Patentees:
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| Edward C. Warren (exact or similar names) - Annapolis, Anne Arundel County, MD |
| Joseph Hay Amies Warren (exact or similar names) - Annapolis, Anne Arundel County, MD |
| Woodruff Warren (exact or similar names) - Annapolis, Anne Arundel County, MD |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 23, 1928 |
| Granted: |
May 31, 1932 |
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Patent Pictures:
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Joel Havens
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Description: |
| Application for patents in Canada, Great Britain and Italy filed 16 Jul., 1923. |
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