▁" Tra ction ▁Engine " ▁(" im prov ement ▁in ▁vehicles , ▁and ▁especially ▁of ▁the ▁tra ction ▁engine ▁class ; ▁and ▁included ▁end less ▁travel ing ▁platform ▁supports ▁upon ▁which ▁the ▁engine ▁is ▁carried "). ▁In ▁ 1 9 0 8 , ▁he ▁designed ▁a ▁gas oline ▁engine ▁to ▁power ▁the ▁tra ctor . ▁ ▁Although ▁Hol t ▁had ▁paid ▁Al vin ▁Or lando ▁Lomb ard ▁US $ 2 0 , 0 0 0 ▁in ▁ 1 9 0 3 ▁( about ▁$ ▁today ) ▁for ▁rights ▁to ▁use ▁his ▁pat ents , ▁Lomb ard ▁visited ▁Hol t ▁in ▁ 1 9 1 0 ▁compla ining ▁of ▁pat ent ▁in fr ing ement . ▁In ▁the ▁opinion ▁of ▁Hol t ' s ▁" very ▁expensive ▁law y ers ", ▁they ▁concluded ▁that ▁Lomb ard ' s ▁pat ents ▁had ▁little ▁value ▁due ▁to ▁prior ▁art . ▁So ▁when ▁Lomb ard ▁visited , ▁Hol t ▁calm ly ▁took ▁him ▁on ▁a ▁le is ure ly ▁country ▁drive ▁in ▁his ▁Old sm obile ▁road ster , ▁and ▁when ▁Lomb ard ▁raised ▁the ▁issue ▁of ▁money , ▁Hol t ▁merely ▁suggested ▁that ▁they ▁divide ▁the ▁country . ▁Lomb ard ▁should ▁take ▁up ▁the ▁Northern ▁woods ▁and ▁Hol t ▁would ▁take ▁the ▁remainder ▁of ▁the ▁nation . ▁Hol t ▁promised ▁to ▁write ▁a ▁letter ▁to ▁that ▁effect , ▁although ▁he ▁never ▁did . ▁ ▁Best ▁invalid ates ▁Lomb ard ▁pat ent ▁▁ ▁In ▁ 1 9 1 5 , ▁the ▁C .   L .  