US Patent: 10,189
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Carpenter's brace and bit-fastener
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Patentee:
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Howard Perkins (exact or similar names) - South Bridgewater, MA |
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Patent Dates:
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Granted: |
Nov. 01, 1853 |
Patent Pictures:
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USPTO (New site tip) Google Patents
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Kirk Eppler
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Description: |
"The nature of my improvement consists in a new mode of fastening the bit into the socket by a slide key as described in the drawing." |
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