| US Patent: 598,203 
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| Lock and Wrench | 
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| Patentee: |  |
 | John Johnson (exact or similar names) - Hartford, CT |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | May 17, 1897 |  
| Granted: | Feb. 01, 1898 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | John Johnson patent February 1, 1898 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | Intended as a cyclist's tool; the lock feature is a screw coordinated with holes in the shank of the movable jaw, and requiring a key to turn it. The screw is guarded by a surrounding "carrier." |  |