Dieter J. Schaefer has been granted 4 US patents while listed as an inventor at Grt. The first was granted in 2003 and the most recent in April 2013. Dieter J. Schaefer ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Dieter J. Schaefer in Kandern, CA, DE.