New: patenetAll contenthive-129948krhive-196917zzanhive-183959hive-185836steemhive-180932hive-150122photographyhive-101145hive-183397uncommonlabhive-144064hive-184714krsuccessbitcoinhive-188619hive-145157hive-193637hive-103599hive-193186hive-180301lifehive-166405TrendingNewHotLikersupernube (25)in tesla • 7 years agoThe Patents of Nikola Tesla Patent number 334,823 Commutator for Dynamo Electric machines 1-26-1886