US Patent: 783,717
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| Visible Auxiliary Oiler for Lubricators
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Patentees:
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| William E. Bryant (exact or similar names) - Detroit, Wayne County, MI |
| Robert Davidson (exact or similar names) - Detroit, Wayne County, MI |
| George M. Wolcott (exact or similar names) - Detroit, Wayne County, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 04, 1904 |
| Granted: |
Feb. 28, 1905 |
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Joel Havens "Vintage Machinery" entry for Michigan Lubricator Co.
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