The AJ logo is patented, so there is tm next to the aj logo.

The AJ logo is patented, so there is tm next to the aj logo. TM means that the LOGO trademark has been patented. TM is a common trademark in foreign countries. It is the abbreviation of "trademark" in English. "trademark" in Chinese means "commercial mark", so "TM" means "trademark".

The difference in upper patterns. The fake TM letters are blurry, the surrounding cortical texture is not clear, and the space between the ‘O’ and ‘R’ letters is narrow. The real TM letters are relatively clear and powerful, the surrounding cortical texture is delicate and clear, and the gaps between the ‘O’ and ‘R’ letters are wider.