Trademark: It is a distinguishing mark of goods, used to distinguish the same kind of goods; such as: Haier, Samsung.

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

Commodity packaging and decoration: It is the outer packaging of the product. The content on it often contains relevant information such as product name, trademark, specifications, usage methods, etc.

Special signs: refer to specific signs used by special industries or special entities, such as the Olympic rings, the Beijing Olympics logo, the QS certification mark, etc.

The above four nouns have no necessary connection with each other. However, trademarks and special signs often seem to have overlapping meanings.