| US Patent: 258,225 
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| Calipers | 
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| Patentee: |  |
 | Henry Foerster (exact or similar names) - Newark, NJ |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jul. 02, 1881 |  
| Granted: | May 23, 1882 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This is a design for firm-joint calipers that uses a tapered eyelet instead of the usual rivet. |  |