John E. Charchenko has been granted 6 US patents while listed as an inventor at Plattforms. The first was granted in 2012 and the most recent in June 2014. John E. Charchenko ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list John E. Charchenko in West Bountiful, UT, US.