US Patent: 2,816,487
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| Milling Machine
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Patentees:
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| Joseph B. Armitage (exact or similar names) - Wauwatosa, Milwaukee County, WI |
| Harold L. Heywood (exact or similar names) - West Allis, Milwaukee County, WI |
| John L. Martin (exact or similar names) - West Allis, Milwaukee County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 16, 1949 |
| Granted: |
Dec. 17, 1957 |
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Joel Havens
"Vintage Machinery" entry for Kearney & Trecker Co.
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