US Patent: 1,391,016 
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| Micrometer
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	        Patentees:
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 | William T. Slider (exact or similar names) - Indianapolis, IN |  
| Harold R. Slider (exact or similar names) - Indianapolis, IN |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Jan. 05, 1921 | 
 
| Granted: | 
Sep. 20, 1921 | 
 
 
 
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                        Joel Havens 
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        Description: |  
| Joseph A. Minturn - patent attorney
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