| US Patent: 628,110 
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| Tapping-machine | 
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| Patentee: |  |
 | Oscar Mueller (exact or similar names) - Decatur, IL |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Apr. 01, 1899 |  
| Granted: | Jul. 04, 1899 |  USPTO (New site tip)
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| Description: |  | "This invention is intended to provide a cheap and superior substitute for the old-style 'crow-hook' dry-pip and gas tapping machine." |  |