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Patent Trivia



>The life of a patent is limited. To avoid any patent violation, simply copy a
>design that is older than the life of the patent. If it is more than 17 years
>old, it is no longer a patent infringement to copy it. 
	17 years for first issue.  Patent law allows for an extension.  To be
	phinicky, one would need to know if the patent had been extended...

	regards
	dwp