US Patent: 1,440,608 
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| Drop Hammer Board
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	        Patentees:
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 | Charles J. Kleist (exact or similar names) - Jamestown, Chautauqua County, NY |  
| Harry E. Kleist (exact or similar names) - Jamestown, Chautauqua County, NY |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Nov. 04, 1921 | 
 
| Granted: | 
Jan. 02, 1923 | 
 
 
 
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                        Joel Havens 
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