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| All Patents in class 123/508 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,346,204 | Jul. 13, 1920 | R.M. Hvid | Valve for Hydrocarbon Engine | valves | |
| 1,393,551 | Oct. 11, 1921 | G. Large | Fuel-pump for internal-combustion engines | ||