Well the Zhang lab did find another CRISPR based system that sidesteps the Cas9-based patents [1].<p>[1]  <a href="http:&#x2F;&#x2F;www.cell.com&#x2F;abstract&#x2F;S0092-8674(15)01200-3" rel="nofollow">http:&#x2F;&#x2F;www.cell.com&#x2F;abstract&#x2F;S0092-8674(15)01200-3</a>