US Patent: 606,543
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| Self-lubricating engine
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Patentee:
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| Elmer E. Hanna (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Dec. 18, 1897 |
| Granted: |
Jun. 28, 1898 |
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Joel Havens
"Vintage Machinery" entry for Hanna Engineering Works
"Vintage Machinery" entry for Gates Iron Works
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Description: |
| At about the same time this patent was issued the inventor also developed a pneumatic screen shaker for foundry use, and ended up leaving Gates Iron Works, with their blessing, to establish Hanna Engineering Works which manufactured the shaker and other products for foundry and boiler-making use. |
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