That makes Zero sense. Seems to me they make all their money on the replacement blades and not the handles. Letting Headblade make an adapter would open up the blade sales alot. Guess those blades are going to their heads (or not).
I wonder how come some entrepreneurial spirit hasn't made an adapter for it, China doesn't give a sh!t about patents or intellectual property rights.
I would think the patent would be for the blade itself and not the adapter it would connect to. But I have not been in the IPTR for ten years.