It was a separate innovation, followed soon after by a different innovation to combine a claw tool and a hammer tool into a combined tool. But there are other

It was a separate innovation, followed soon after by a different innovation to combine a claw tool and a hammer tool into a combined tool. But there are other things you can put on the other end of a hammer besides a claw, none of which made the original hammer a bad idea if all your problems really are nails that you don't need to claw back out.