US Patent: 4,177,550
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| Machine Tool With Hollow Structural Steel Members
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Patentees:
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| Charles B. Sipek (exact or similar names) - Hales Corners, Milwaukee County, WI |
| Richard Johnstone (exact or similar names) - Brookfield, Waukesha County, WI |
| Russell B. Clegg (exact or similar names) - Milwaukee, Milwaukee County, WI |
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Patent Dates:
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| Applied: |
Feb. 01, 1978 |
| Granted: |
Dec. 11, 1979 |
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Joel Havens "Vintage Machinery" entry for Kearney Trecker Corp.
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