| US Patent: 9,109 
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| Railroad-car brake | 
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| Patentees: |  
 | Asahel G. Batchelder (exact or similar names) - Lowell, MA |  | Lafayette F. Thompson (exact or similar names) - Charlestown, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Jul. 06, 1852 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | Co-inventor Batchelder also made spokeshaves; see also patents 8,953 and 9,705. |  |