Bernd Buttelmann has been granted 13 US patents while listed as an inventor at Hoffmann-La Roche. The first was granted in 1997 and the most recent in March 2002. Bernd Buttelmann ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Bernd Buttelmann in Schopfheim, DE.