This thesis discusses patent rights which are one type of legal protection in Intellectual Property Right towards an invention created by the inventor. Where patent rights in Indonesia that use the first to files system that is where the parties who register in advance that is recognized as the inventor. In the grant of a patent, there is the Ordinary Patent and Simple Patent. In the case that took place between Takal Barus against Udjam Djunus, which is the problem i.e. based on the use of Ordinary Patents without permission in advance to holders of patents, resulting in heavy losses towards the patent holder. Which is based on the first to file system there is a Takal Barus already register its invention as evidenced by the certificate of patent number ID0011240. In this case, it would be more important for knowing how the patent holder to perform its obligations in order to acquire what remained of his right. In resolving this case the Tribunal Judges to use Patent Law No. 14 of 2001.