Eric Douglas Springston, II has been granted 14 US patents while listed as an inventor at Multi-Shifter. The first was granted in 1994 and the most recent in March 2022. Eric Douglas Springston, II ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Eric Douglas Springston, II in Hershey, PA, US.