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Alias Born 12/23/2009

Re: DDobserver post# 20401

Friday, 12/18/2015 7:09:51 AM

Friday, December 18, 2015 7:09:51 AM

Post# of 46530
again I have the backfire question as the dilemma is If you use an invention publicly you have 12 months to file the patent application. i.e. the practice, if it happened in 1993-4 would invalidate the Worlds patent or?