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| Patents for Pearl Proper | |||||
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| Number | Date | Patentee | Title | Type | |
| 984,023 | Feb. 14, 1911 | W.O. Platt | Governing Valve for Gas Engines | internal combustion engine governors | |
| 1,079,878 | Nov. 25, 1913 | J. Reid, W.O. Platt | Vaporizer and Igniter for Internal Combustion Engines | ignition systems | |