US Patent: D34,139
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| Design for a Firmer Chisel
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Patent Dates:
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| Applied: |
Jan. 24, 1901 |
| Granted: |
Feb. 26, 1901 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Design is for the cross section shape of the chisel blade, "straight sides inclining slightly toward each other from edge to base and inclining slightly inward from bottom to top, bottom being flat, the very top consisting of two planes lying at a very obtuse angle to each other and intersecting at a center line which inclines slightly toward the bottom from the base forward..."
Term of patent is 14 years.
James Swan also patented a chisel design several weeks later with a semi-circular cross section, D34215.
Example found with this patent date, see the pictures |
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