 A technical examination with today's methods of science to establish, if possible, a final truth on the production year of the lamps and to clear up technical points of dispute in the litigations did not take place yet.Franklin Leonard Pope was a close friend of Thomas Alva Edison but later he was in quarrel with him.He was an important man with a good reputation in the field of electricity; in 1886 he was the President of the "American Institute of Electrical Engineers".