Sandy-- NARA Roll of Honor for Johnson County OK shows the following:
OSBORNE CLIFFORD M38153141 PVT DNB
I guess the big thing that jumps out is the middle initial discrepency. The number is called his ASN (Army Serial Number)which was his individual identifier on all muilitary records. The first number (3) indicates that he was drafted.PVT is his rank at the time of loss--Private.DNB is a code used to categorize the loss: Dead Non Buried.
ABMC shows that his name is memorialized on the tablets of the missing at the Presidio in California:
Clifford M. Osborne Private, U.S. Army 38153141 Corps of Engineers Entered the Service from: Oklahoma Died: January 20, 1946 Missing in Action or Buried at Sea Tablets of the Missing at West Coast Memorial Presidio, California
The 1946 date in the case of a MIA usually indicates that the date of loss was "a-year-and-a-day" previous to the date cited.Therefore you should look to a date of 19JAN45 as the date he was actually lost.