Trademark: it is a distinguishing mark of goods, which is used to distinguish the same kind of goods; Such as Haier and Samsung.

Product name: It is the product name. Such as air conditioners and refrigerators.

Commodity packaging and decoration: it is the outer packaging of products, which often contains product name, trademark, specification, usage and other related information.

Special signs: refers to the special signs used by special industries or special subjects, such as the Olympic rings, Beijing Olympic Games, QS certification marks, etc.

The above four nouns are not necessarily related. However, trademarks and special signs often seem to have overlapping meanings.