Hello Lois, I looked at the R. L. Polk's Portland City Directories from 1952 through 1962, but didn't find anyone named Ivan OSBORN. I also checked spellings of OSBORNE, OSBOURN, OSBOURNE, but still no Ivan for those years.
I found a Hugh I. OSBORN with wife Amanda S. in some of those years. Amanda's middle initial was also found as the letter "C." I don't know if Hugh's middle initial was for the name Ivan.
Is it possble Hugh was his first name and Ivan possibly his middle name?