| US Patent: 814,016 
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| Lubricator | 
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| Patentees: |  
 | William E. Bryant (exact or similar names) - Detroit, Wayne County, MI |  | George M. Wolcott (exact or similar names) - Detroit, Wayne County, MI |  | Robert Davidson (exact or similar names) - Detroit, Wayne County, MI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Apr. 23, 1904 |  
| Granted: | Mar. 06, 1906 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Michigan Lubricator Co.
 
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