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| All Patents in class 313/145 | |||||
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| Number | Date | Patentee | Title | Type | |
| 582,540 | May 11, 1897 | O. Mueller | Igniter for Explosive Engines | ignition systems | |
| 676,468 | Jun. 18, 1901 | N. McClintock | Ignition Plug for Gas Engines | spark plugs | |
| 1,401,585 | Dec. 27, 1921 | V.D. Collins, A.F. Collins | Spark Plug | spark plugs | |