Robert, I wasn't able to find any info for the 1920 census, only the 1930 census and you found his draft registration as well!!! But his birthdate on the draft registration is not the same as I have on his death certificate, it's listed there as 4 July 1889. Is there a way you could send me copies or an email with the 1920 census and his draft registration?
As for his wife Helen, her maiden name was Samon. I have her birthyear as 1893 and she died 9 March 1931 in PA. Don't have any other info on her.
I will try to contact Janos Kocs. Thanks for the website.