| US Patent: 245,634 
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| Lifting-jack | 
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| Patentees: |  
 | Charles S. Harmon (exact or similar names) - Blue Island, IL |  | Thomas J. Jenne (exact or similar names) - Gouverneur, NY |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jan. 17, 1881 |  
| Granted: | Aug. 16, 1881 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | The patent assignment amounts to 70 percent to Harmon, 20 percent to Stanford, and 10 percent to Smith. |  |