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| Patents for David Wallace | |||||
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| Number | Date | Patentee | Title | Type | |
| 634,324 | Oct. 03, 1899 | W.E. Canedy | Attachment for metal-drilling machines | drill presses | |
| 651,816 | Jun. 19, 1900 | M. Backstrom | Friction driving-clutch | industrial machine clutches | |
| 690,360 | Dec. 31, 1901 | A.E. Canedy | Driving-motor | blowers | |