Haha - yes, but it's probably safe to assume they knew about that already when the patent was granted and they overcame it. Perhaps because it's solving a long-

Haha - yes, but it's probably safe to assume they knew about that already when the patent was granted and they overcame it. Perhaps because it's solving a long-standing problem or because the axe is a very different application of force, or something. The above is basically a sports bat so might be close enough to warrant a different perspective.