Fedor Romantsev has been granted 6 US patents while listed as an inventor at Pro-Neuron. The first was granted in 2001 and the most recent in May 2012. Fedor Romantsev ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Fedor Romantsev in Gaithersburg, MD, US.