US Patent: 185
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Double-Centered Joint for Rules
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Patentee:
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Lemuel Hedge (exact or similar names) - Hartford, CT |
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Patent Dates:
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Granted: |
Apr. 29, 1837 |
Patent Pictures:
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Ralph Brendler
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Description: |
This is a very unusual rule joint, which uses two centers instead of the usual one. It is a very decorative joint, but provides little concrete benefit. |
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