Ah I see now that I look and read more closelyI suspect they meant Duke brand coil spring traps... not Duke brand dog proof traps.
Duke is just a brand of trap, but I’ve noticed that some folks sometimes call one style or another “Dukes”
I’ve caught just about every type of furbearer in coil spring traps, only ever caught ‘coons and ‘possums in dog proof style traps...but I have not used that type of trap much.