| US Patent: 20,055 
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| Ruler | 
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| Patentee: |  |
 | Thomas Fisher (exact or similar names) - Camden, NJ |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Apr. 27, 1858 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This is a very simple patent covering the inlaying of two rubber strips
    into a ruler to prevent it from slipping in use. |  |