US Patent: 2,464,156
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Expanding Chuck or Mandrel
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Patentees:
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Gerald L. Sandersen (exact or similar names) - Essex, Middlesex County, CT |
Karl K. Nielsen (exact or similar names) - Essex, Middlesex County, CT |
Colin Campbell (exact or similar names) - Essex, Middlesex County, CT |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Feb. 20, 1946 |
Granted: |
Mar. 08, 1949 |
USPTO (New site tip) Google Patents
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Joel Havens
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