No, 15-year protection is the minimum protection any country will grant its patentees. In some countries, the patent right duration for invention is 20 years.

不是，各国都对专利人给予了最低15年的专利保护。在一些国家，发明专利的保护期是20年。

He was a patentee of the Openshaw unbreakable tire, and his business met with such success that he was able to sell it and to retire upon a handsome competence.

他享有奥彭肖防破车胎的专利权，因而生意十分兴隆，这就使他后来能够将工厂出让，而依靠一笔巨款过着富裕的退休生活。