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| All Patents in class 137/505.42 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,152,781 | Apr. 04, 1939 | D.D. Wile | Control Device | temperature controls | |
| 2,209,216 | Jul. 23, 1940 | D.D. Wile | Control Device | heating apparatus | |
| 2,259,280 | Oct. 14, 1941 | D.D. Wile | Control Device | refrigeration apparatus | |
| 3,132,485 | May 12, 1964 | J.R. Watson | Hydraulic Motor Control | ||