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| Patents Granted on 1947-05-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-441,621 | May 20, 1947 | S.H. Hall | Continuous gluing machine | gluing machines | |
| 2,420,853 | May 20, 1947 | G.A. Biggs | Hydraulic Turbine | turbine water wheels | |
| 2,420,984 | May 20, 1947 | R.H. Shepard | Hydraulic Pump | hydraulic pumps | |