When it comes to intellectual property, it's a registered trademark that protects a logo or business name.

说到知识产权，知识产权是保护商标或商号的注册商标。

The assignee should, of course, guarante the quality of the goods when he uses the registered trademark.

受让人应当保证使用注册商标的商品质量。

No, those are all registered trademarks.

不 那些都已经成为注册商标了。