Kawai Synthesizers

i have experience of an xs-1/kc-10 and a k1m
and looked at the module of a k4
it looks as if kawai constantly use pretty much the same samples
as these models don't generate sounds as such
are the samples literally taken from oberheim, korg etc, synths
this seems to be the implication of the soundfont that can be 
downloaded freely of k4 source waves which are explicitly named
after other manufacturers models
i am curious about the copyright issues here...if these samples
were taken from other manufacturers synth was there no objection to 
it?