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| Patents for Robert D. Williams | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,200,379 | May 14, 1940 | R.D. Williams | Utilization of Waste Engine Heat | exhaust mechanisms | |
| 2,256,303 | Sep. 16, 1941 | R.D. Williams | Recovery and Utilization of Waste Engine Heat | exhaust mechanisms | |