Holger Hackstein has been granted 12 US patents while listed as an inventor at Siemens Aktiengesellschaft. The first was granted in 2013 and the most recent in February 2020. Holger Hackstein ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Holger Hackstein in Dietzenbach, DE.