US Patent: 808,897 
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| Apparatus for treating air
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	        Patentee:
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 | Willis H. Carrier (exact or similar names) - Buffalo, NY |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
Sep. 16, 1904 | 
 
| Granted: | 
Jan. 02, 1906 | 
 
 
 
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                        Jeff Joslin Vintage Machinery entry for Buffalo Forge Co. 
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        Description: |  
| This patent covers what is considered to be the first modern air conditioner, that is, a device that controls both temperature and humidity while circulating and cleaning the air. |  
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