Oracle and Fujitsu are working together to develop the SPARC64 architecture.
If I take an _old_ example: T2000. You can have a "Sun branded" on and a "Fujitsu branded" one to but both have the same hardware.
https://support.oracle.com/handbook_...reT2000_R.html
UNIX Server SPARC Enterprise T2000 : Fujitsu Global
Who built it first? I can't tell you.
Same thing for M series etc ...
It's also a fact that both vendors offer hardware support for the whole plateforms.
Check the vendor-ids from "prtpicl -v" you'll be surprised.
And no, SPARC is not an Oracle trademark. It was developped by Sun in the late 80s. It's Sparc International's trademark.
IMHO, Fujitsu will buy Oracle's hardware developement divsion / technical support people.