| US Patent: 593,296 
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| Oil and Gas Engine | 
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| Patentee: |  |
 | Jean J. Heilmann (exact or similar names) - Paris,  France |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Feb. 17, 1897 |  
| Granted: | Nov. 09, 1897 |  USPTO (New site tip)
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                        Joel Havens
 
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| Description: |  | Patented in France, 26 Dec., 1895, #252,742; in Belgium, 06 Jul., 1896, #122,364; in England, 09 Jul., 1896, #15,197; in Switzerland, 11 Jul., 1896, #12,687; in Hungary, 11 Aug., 1896, #6,769 and in Austria, 11 Aug., 1896, #3,373/46. |  |