Arthur Eichengrün was a Jewish chemist who lived in Germany and was running his own chemical company. In 1938 his company has been "aryanized". But as late as 1943 he got arrested for failing to indicate the Jewishness in his company's name. He spent 4 months in prison, but got arrested again a year later on the same charge and spent 14 months in a camp.
How this can be true? Had he retain any influence in his company after it was "aryanized" and if it was why the Nazis demanded him to indicate the Jewishness of the owner in the company's name?