| US Patent: 550,451 
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| Gas Engine | 
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| Patentees: |  
 | Henry A. Lauson (exact or similar names) - Chicago, IL |  | John J. Norman (exact or similar names) - Chicago, IL |  | Abram A. Nott (exact or similar names) - Janesville, Rock County, WI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jun. 04, 1894 |  
| Granted: | Nov. 26, 1895 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for J. J. Norman Co.
 "Vintage Machinery" entry for John Lauson Mfg. Co.
 
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