US Patent: 2,773,471 
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| Speed Indicating Plate for Machine Tools
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	        Patentees:
		   |  
 | Harold J. Siekmann (exact or similar names) - Cincinnati, OH |  
| George J. Kasselmann (exact or similar names) - Cincinnati, OH |  
| William Okvit (exact or similar names) - Cincinnati, OH |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Nov. 07, 1955 | 
 
| Granted: | 
Dec. 11, 1956 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for R. K. Leblond Machine Tool Co. 
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