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| Patents for Henry J. Betjemann | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 6,668 | Aug. 28, 1849 | J. Garside, H.J. Betjemann | Machinery for cutting screws in bedsteads | |
 | 7,807 | Dec. 03, 1850 | H.J. Betjemann | Machine for boring dovetailed mortises | |