US Patent: 2,177,820
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Boring Chuck
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Patentee:
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Harry F. Brown (exact or similar names) - Detroit, Wayne County, MI |
USPTO Classifications: |
279/6 |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Jun. 23, 1937 |
Granted: |
Oct. 31, 1939 |
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Joel Havens
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Description: |
This patent was improved by patent #2,276,462. |
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