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Old 04-26-2011, 12:39 PM   #13 (permalink)
desertT1
Slowly making progress
 
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Join Date: Apr 2008
Location: Vail, AZ

It's 20 years, if you maintain it by paying the small fee every 4-5 years. But what patent are you looking at that is about to expire? This one was approved in 2004, so it's not quite on its deathbed. http://haveblue.org/tech/patents/US006694963.pdf
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