| Inventions that are related. | Simple Things YOU can test. |
| Alexander | Frenette friction heater |
| Markovich Coil receiver | Heartman Magnetic propulsion system |
| Johnson's Magnetic Motor, in Color | |
| Prentice wire receiver |
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| Britten receiver | |
| Coler magnet receiver | |
| Ecklin Generator | |
| Common factors |
