US Patent: 1,574,983
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| Lubricator
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Patentee:
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| Elijah McCoy (exact or similar names) - Detroit, Wayne County, MI |
| Assignees: |
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Armster Havard - Detroit, Wayne County, MI |
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Albert L. Stricker - Detroit, Wayne County, MI |
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Margaret E. Warren - Detroit, Wayne County, MI |
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Alma Zienert - Detroit, Wayne County, MI |
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William Zienert - Detroit, Wayne County, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 12, 1924 |
| Granted: |
Mar. 02, 1926 |
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Joel Havens
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