There was a period of time when the tap mechanic was used by nearly every collectible card game but they all had their own name for it. The mechanic was the sam

There was a period of time when the tap mechanic was used by nearly every collectible card game but they all had their own name for it. The mechanic was the same (rotating the card slightly to show it had been used that turn) which I would have thought was what a patent protected against, rather than protecting the name which would have been copyright.