| US Patent: 246,831 
 | 
| Adjustable Siding Square or Hook | 
| 
| Patentees: |  
 | Charles W. Spickerman (exact or similar names) - Winnebago City, MN |  | Jeremy R. Martin (exact or similar names) - Winnebago City, MN |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Applied: | Feb. 10, 1881 |  
| Granted: | Sep. 06, 1881 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This is a specialized clapboard marker designed to allow a "gain" to be marked
    on the board.  This supposedly allows the tool to handle warped or out-of-square
    corner boards. |  |