US Patent: 2,004,639
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| Diestock
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Patentee:
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| William O. Thewes (exact or similar names) - Ridgeville, Warren County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 11, 1933 |
| Granted: |
Jun. 11, 1935 |
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Patent Pictures:
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Willaim O. Thewes patent June 11, 1935 |
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Stan Schulz
"Vintage Machinery" entry for Ridge Tool Co.
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Description: |
| Reversible pawl structure for a ratcheting pipe threader having interchangeable die heads. |
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