US Patent: 2,904,339
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| Centering chucks
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Patentees:
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| Linwood B. Swanson (exact or similar names) - Newington, CT |
| Jerome J. Rutherford (exact or similar names) - Granby, CT |
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Patent Dates:
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| Applied: |
Jan. 29, 1957 |
| Granted: |
Sep. 15, 1959 |
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Jeff Joslin
Vintage Machinery entry for Cushman Chuck Co.
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Description: |
| This patent date was seen on a Cushman catalog for their "pinch-type jaws", along with patents 2,757,010, 2,757,009 and 2,860,884. |
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