| US Patent: 236,475 
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| Mechanism for finishing the bottoms of boots and shoes | 
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| Patentees: |  
 | Artemas C. Ambler (exact or similar names) - Natick, MA |  | James A. Ambler (exact or similar names) - Natick, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Oct. 15, 1880 |  
| Granted: | Jan. 11, 1881 |  USPTO (New site tip)
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                        Jeff Joslin
 Vintage Machinery entry for Ambler Saw Mfg. Co.
 
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| Description: |  | Of interest because co-inventor Artemas C. Ambler went on to develop and manufacture saw-sharpening machinery. |  |