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Originally Posted by BadNewsRef
How long has PTS been around? Is it possible they still have patent/trade secret protection?
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If they do have a patent, should be near expiration. PTS has been in use for over 15 years, probably closer to 20 and patents expire 20 years after the first filing. They would have filed for the patent before selling the product. (It used to be 17 years from issue, but that changed in the mid-90's.).
Even if they have patents on it, their patented method can't be the only way to do something like that.