US Patent: 2,931,254
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Boring Head
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Patentees:
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Ottis R. Birney, Jr. (exact or similar names) - Pontiac, Oakland County, MI |
James W. Birney (exact or similar names) - Pontiac, Oakland County, MI |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Oct. 14, 1957 |
Granted: |
Apr. 05, 1960 |
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Joel Havens
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