US Patent: RE8,215
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Improvement in braces for bits
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Patentee:
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Nelson Spofford (exact or similar names) - Haverhill, MA |
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Patent Dates:
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Applied: |
May 01, 1878 |
Granted: |
May 07, 1878 |
Reissue Information: |
Reissue of RE2,576 (Apr. 23, 1867) |
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Kirk Eppler
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Description: |
Extended November 1, 1873 for seven years
Extended twice. (April 23, 1867 as RE2,576 & November 1, 1873 as RE8,215) |
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