| US Patent: 408,708 
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| Steam-generator | 
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| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Nov. 24, 1886 |  
| Granted: | Aug. 13, 1889 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | This patent is an improvement to patent 291,185.Co-inventor Horatio Hobbs was deceased by the time the patent was issued; his "administratrix" was Armenia W. Hobbs. |  |