| US Patent: 185 
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| Double-Centered Joint for Rules | 
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| Patentee: |  |
 | Lemuel Hedge (exact or similar names) - Hartford, CT |  
 
 
 
 
 
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| Patent Dates: |  
| Granted: | Apr. 29, 1837 |  
 
USPTO (New site tip)| Patent Pictures:
	      
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                        Ralph Brendler
 
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| Description: |  | This is a very unusual rule joint, which uses two centers instead of the usual one. It is a very decorative joint, but provides little concrete benefit. |  |