CA Patent: CA-144,581 
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| Psychrometer
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	        Patentee:
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 | Willis H. Carrier (exact or similar names) - Buffalo, Erie County, NY |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Aug. 02, 1912 | 
 
| Granted: | 
Dec. 10, 1912 | 
 
 
 
CIPO Data Espacenet patent 
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                        Joel Havens "Vintage Machinery" entry for Buffalo Forge Co. 
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        Description: |  
| A hygrometer consisting of a wet-bulb and a dry-bulb thermometer, the difference in the two thermometer readings being used to determine atmospheric humidity. |  
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