Yeah there is a way to "grift" or grow a new plant from cuttings of an established plant. I'm not a gardener so my knowledge is limited...
The word you are looking for is sprig.
I don't think black berry bshes are grafted. Just dig up a few roots in the falland plant them where you want them.
the trick is to get them once ripe but before the birds get to them, quite the balancing act! In my area( Des Moines Iowa) they are now in bloom and I'm squirreling away the locations
