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| All Patents in class 123/169CB | |||||
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| Number | Date | Patentee | Title | Type | |
| 352,796 | Nov. 16, 1886 | C.W. Baldwin | Electrical Igniter for Gas Engines | ignition systems | |
| 588,466 | Aug. 17, 1897 | A.G. Pace | Combustion Engine | internal combustion engines | |