How any US firm could have received income during the war from Germany for its property in Germany remains unclear.
Probably through the usual way, through Switzerland. I have never read this book, don't know how good is it: Trading With the Enemy
Or Spain or Sweden.
I have remarked on this before, but there is a fairly large collection of movie film from WW2 Germany taken on kodachrome, that was only developed in one place in the world - that is in the USA..
It is likely that this film was sent to the USA for processing via a neutral state only to be sent back the same way. I am not talking about pre Pearl Harbor, but being sent from Germany to the USA post Dec 1941.
Edited by DougRichards, 23 September 2018 - 0854 AM.