According to courtroom ruling :
How German firms can reclaim US tariffs
dpa
German firms can’t instantly demand again US tariffs. But that does not imply they do not have calls for. US Attorney Manny Schoenhuber explains what proof is important and why persistence is required.
https://www.faz.net/aktuell/finanzen/us-zoelle-so-koennen-deutsche-firmen-rueckerstattungen-sichern-accg-110845340.html