US Patent: 691,135
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| Ore-crusher
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Patentee:
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| Elmer E. Hanna (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 29, 1901 |
| Granted: |
Jan. 14, 1902 |
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Jeff Joslin
Vintage Machinery entry for Allis-Chalmers Mfg. Co.
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Description: |
| The inventor had recently left Gates Iron Works to establish Hanna Engineering Works. It appears that designing this ore crusher was a holdover from work he had been doing at Gates. Hanna Engineering Works was ultimately very successful and is still in business as of 2019, as Hanna Corp. |
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