US Patent: RE20,974 
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| Metal Working Apparatus
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	        Patentees:
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 | Paul R. Guirl (exact or similar names) - Rockford, Winnebago County, IL |  
| John S. Barnes (deceased, estate of) (exact or similar names) - Rockford, Winnebago County, IL |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
Feb. 10, 1935 | 
 
| Granted: | 
Jan. 10, 1939 | 
 
 
 
| Reissue Information: |  
| Reissue of 2,030,562 (Feb. 11, 1936) |  
 
 
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		  Patent Pictures:
	      
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                        Joel Havens "Vintage Machinery" entry for W. F. & John Barnes Co.  
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        Description: |  
| This patent was seen on a patent plate of a Cincinnati Cylindrical Grinder. |  
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