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| Patents for Francis V. Marchal | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,460,157 | Jul. 17, 1984 | F.V. Marchal | High Pressure Ball Valve | steam engine valves | |
| EP-141,888 | May 22, 1985 | F.V. Marchal | High Pressure Ball Valve | industrial valves | |
| CA-1,220,186 | Apr. 07, 1987 | F.V. Marchal | Robinet A Boisseau Spherique Pour Hautes Pressions | industrial valves | |