Comment by glenstein

>The patent office doesn't serve the patenting of physical theories

That wasn't the claim and is beside the point. The reference to the patent office illustrated what notion of "perpetual motion" we were using when Drebels invention was offered as an example of one. No amount of equivocation between the formal understanding and evolving historical understanding makes Drebels device into that in ths context and I don't understand the point is of trying to equivocate about it.

Edit: As a matter of fact the patent office did grant patents for devices just like this, such as the Atmos clock which relied on passive environmental energy draw and weren't confused about it being a perpetual motion machine. So again, Drebel's device didn't belong to that category which was the category we were talking about in this context.