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| Patents for Axel Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 661,291 | Nov. 06, 1900 | A. Johnson | Sparking Igniter for Explosive-Engines | ignition apparatus | |
| 686,078 | Nov. 05, 1901 | A. Johnson | Screw Holding Screwdriver | screwdriver blades | |