| US Patent: 315,388 
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| Plotter For Tinners' Use | 
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| Patentee: |  |
 | Christian D. Cowgill (exact or similar names) - Terre Haute, IN |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Dec. 10, 1884 |  
| Granted: | Apr. 07, 1885 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This is a specialized square and bevel gage for use by tinsmiths.  It can easily figure and mark the angles for any regular polygon. |  |