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| All Patents in class 123/149A | |||||
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| Number | Date | Patentee | Title | Type | |
| 663,729 | Dec. 11, 1900 | J.G. Heaslet, L.S. Clarke | Sparking Igniter for Explosive-Engines | ignition systems | |
| 2,043,042 | Jun. 02, 1936 | R.W. Crocker, K.A. Harmon | Magneto | ignition systems | |
| 2,074,545 | Mar. 23, 1937 | T.G. Louis, K.A. Harmon | Magneto | ignition systems | |