CA Patent: CA-12,993 
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Improvements in Hot Air Engines Perfectionnements Aux Machines a Air Chaud
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	        Patentees:
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 | James A. Woodbury (exact or similar names) - Boston, Suffolk County, MA |  
| Joshua Merrill (exact or similar names) - Boston, Suffolk County, MA |  
| George Patten (exact or similar names) - Boston, Suffolk County, MA |  
| Edward F. Woodbury (exact or similar names) - Boston, Suffolk County, MA |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Granted: | 
Jun. 15, 1881 | 
 
 
 
CIPO Data Espacenet patent 
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                        Joel Havens "Vintage Machinery" entry for Woodbury, Merrill, Patten and Woodbury Air Engine Co. The Woodbury Hot Air Engine 
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