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| All Patents in class 310/156.52 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,827,323 | Oct. 13, 1931 | T.G. Louis | Magneto | ignition systems | |
| 1,932,978 | Oct. 31, 1933 | T.G. Louis | Magneto | ignition systems | |
| 1,970,327 | Aug. 14, 1934 | T.G. Louis | Magneto | ignition systems | |
| 2,043,042 | Jun. 02, 1936 | R.W. Crocker, K.A. Harmon | Magneto | ignition systems | |
| 2,110,321 | Mar. 08, 1938 | K.A. Harmon, W.O. Bechman, W.F. Borgerd | Magneto | ignition systems | |
| 2,175,258 | Oct. 10, 1939 | J.L. Engler | Magneto Rotor Construction | magnetos | |