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Summary
The Knapp illustrated in Patent No.388,760
https://workingbyhand.wordpress.com/2020/08/25/the-knapp-joint/
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:11, 4 February 2024 | | 620 × 428 (38 KB) | Isidore (talk | contribs) | The Knapp illustrated in Patent No.388,760 https://workingbyhand.wordpress.com/2020/08/25/the-knapp-joint/ |
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