| US Patent: 327,641 
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| Countersink | 
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| Patentees: |  
 | George S. Forrest (exact or similar names) - Concord, NH |  | George W. Abbott (exact or similar names) - Concord, NH |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | May 14, 1885 |  
| Granted: | Oct. 06, 1885 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | An example is reported, stamped "OTIS SMITH / ROCKFALL, CONN / PAT.OCT.6.85". |  |