According to the website i linked, there is some discrepancy about who actually produced the artwork for the deck. To my eye, it look to be signed "Hague", but no such person is known to have produced other playing card art.
With the war ending, a new government being formed, and a rush to get the deck produced, i doubt anyone ever applied for a copyright, but I'm certainly no expert.
And to Daniel, the deck was purchased at auction in central Pennsylvania. No clue how it got there, or the lineage of the deck. No conection to my family, but I'll never forget the convo I had with the veteran.
As i typed this, a name popped in my head. Stanley Wylowski. I think that is the man i spoke to, with a misspelled last name. Will research...
EDIT: almost! His name is Stanley Vomacka, and you can read about him here:
http://www.redbullrising.com/2011/09/association-celebrates-red-bull-history.htmlHe was still alive a couple years ago.