From 2016, notably and somewhat unfortunately. Kimer Med said more recently that they "signed an exclusive license agreement for US patent 7566694, 'Anti-Pathogen Treatments,' which is the one and only remaining active patent related to Todd Rider’s original DRACO work" - <a href="https://www.kimermed.co.nz/whats-new/" rel="nofollow">https://www.kimermed.co.nz/whats-new/</a>