US Patent: 971,243
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| Relieving Attachment for Lathes
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Patentees:
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| Edward W. Blum (exact or similar names) - Cincinnati, Hamilton County, OH |
| William T. S. Johnson (exact or similar names) - Cincinnati, Hamilton County, OH |
| Frederick Kropf (exact or similar names) - Cincinnati, Hamilton County, OH |
| USPTO Classifications: |
| 82/19 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 03, 1910 |
| Granted: |
Sep. 27, 1910 |
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Joel Havens
"Vintage Machinery" entry for Bradford Machine Tool Co.
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