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| Patents for Harold P. Holt | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,242,674 | May 20, 1941 | H.P. Holt | Clutch Device | industrial machine clutches | |
| 2,341,779 | Feb. 15, 1944 | H.P. Holt | Sector Arm for Weighing Scales | scales and balances | |