▁pat ents . ▁His ▁M ers hon ▁Cond ens ers ▁were ▁featured ▁in ▁the ▁popular ▁C ros ley ▁brand ▁rad ios , ▁and ▁suppress ed ▁the ▁ 6 0 ▁c ps ▁hum ▁heard ▁without ▁them . ▁In ▁ 1 9 3 0 ▁the ▁M ers hon ▁company ▁was ▁bought ▁by ▁Mag nav ox , ▁and ▁the ▁brand ▁was ▁dis cont in ued . ▁However , ▁the ▁pat ent - holder ▁continued ▁to ▁defend ▁his ▁interest ▁with ▁law su its : ▁M erson ▁v . ▁Robinson ▁( 3 0 ▁June ▁ 1 9 4 1 ) ▁and ▁M ers hon ▁v . ▁Sp rag ue ▁( 2 ▁April ▁ 1 9 3 6 ). ▁ ▁Ralph ▁M ers hon ▁never ▁married . ▁He ▁died ▁February ▁ 1 4 , ▁ 1 9 5 2 , ▁in ▁Co con ut ▁Gro ve , ▁Florida . ▁His ▁Pap ers ▁are ▁preserved ▁by ▁Ohio ▁State ▁University ▁Archives . ▁In ▁ 1 9 5 6 ▁Ohio ▁State ▁University ▁Press ▁published ▁a ▁two - volume ▁bi ography ▁by ▁Ed ith ▁D . ▁C ock ins , ▁who ▁was ▁registr ar ▁of ▁the ▁University ▁from ▁ 1 8 9 5 ▁to ▁ 1 9 4 4 . ▁From ▁the ▁account , ▁she ▁came ▁to ▁know ▁him ▁first ▁when ▁the ▁al umn i ▁association ▁was ▁inv ig or ated ▁by ▁his ▁Pres iden cy . ▁The ▁first ▁volume ▁rec ount s ▁M ers hon ' s ▁life ▁and ▁engineering ▁projects , ▁the ▁second ▁is ▁an ▁edited ▁and ▁annot ated ▁collection ▁of