toroidal solenoid
... that the toroidal solenoid was the first fusion-power device to be patented?
... that the <b id="mweg"><a href="./Toroidal_solenoid" id="mwew" rel="mw:WikiLink" title="Toroidal solenoid">toroidal solenoid</a></b> was the first <a href="./Fusion_power" id="mwfA" rel="mw:WikiLink" title="Fusion power">fusion-power</a> device to be patented?