Hanmi is defeated in revocation trial of Viagra’s ‘blue diamond shape’ patent

The Viagra’s blue diamond shape was recognized to be exclusively used by Pfizer.

The 4^th Court of the Patent Court announced, on the 25^th, the revocation of the exclusive use right of the Viagra’s blue diamond shape filed by Hanmi Pharm was ruled against the plaintiff.

Hanmi Pharm argued Viagra has never been used as it was described in the registered trademark right, claiming Pfizer register...