Erich L. Ringewald has been granted 15 US patents while listed as an inventor at Amazon. The first was granted in 2007 and the most recent in March 2016. Erich L. Ringewald ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Erich L. Ringewald in Belvedere, CA, US.