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| Patents for Henry R. Welby | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,281,400 | Apr. 28, 1942 | H.R. Welby | Lubricating Device | flange lubricators | |
| 2,481,183 | Sep. 06, 1949 | H.R. Welby | Pump Priming Means | reciprocating pumps | |
| 2,536,791 | Jan. 02, 1951 | H.R. Welby | Liquid Feed Dividing Means | liquid manifolds | |