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Re: Windmills of the mind...?

Nick Pelling wrote:
> I should perhaps also point out that there are now so many patents of
> devices of this type that the USPTO has an entire classification category
> devoted to them.  

	I can't resist.  This classification category is
sometimes known as
the "round file", since the USPTO knows that the First
and Second Laws of 
Thermodynamics make a perpetual motion machine