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Starting on Sept. 16, 2012 inter partes review (IPR) replaced inter partes reexamination (IPRex). Almost a year and half later, the experiment is still in its infancy. Because it takes about 18 months from filing to final decision, at the time of this writing we still have only one final IPR decision! Many more will come soon, but there has already been plenty of action at the Patent Trial & Appeal Board (PTAB) to permit some early conclusions. The simple answer is, yes, IPR is better.