Also don't know. The few I've seen, all seem to be maker-dependent, as to what they call them. Generically, I've just known them as '______ knife with locking main blade', or something to that effect. The traditional patterns I've seen, with such a config, are usually described by the traditional pattern name (trapper, folding hunter, etc), sometimes with little/no specific reference to the lock itself.
I do have a couple of Camillus-designed Moore Maker knives called 'Double Lockback' (smaller copperhead pattern trapper, and larger 'jumbo' trapper; both blades lock on each of them).
David