| US Patent: 347,469 
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| Gas Engine | 
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| Patentee: |  |
 | John H. Clark (exact or similar names) - Boston, MA |  
 
| USPTO Classifications: |  | 123/190.14, 123/195HC, 123/196R, 123/197.1, 123/198D, 123/274, 123/294, 123/41.01, 123/41.2, 123/41.72, 123/41.85, 123/65VD, 123/661, 123/68, 123/70R |  
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Sep. 12, 1885 |  
| Granted: | Aug. 17, 1886 |  USPTO (New site tip)
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                        Joel Havens
 
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