What do the circles C and P in the trademark symbol mean? (used to identify the year the CD was produced)

In China, the TM on the trademark also has its own special meaning. In fact, the TM mark does not protect the trademark. It is different from R. TM means that the trademark has been applied to the National Trademark Office, and The National Trademark Office has also issued a "Notice of Acceptance" and entered the opposition period. This will prevent others from filing repeated applications and also indicates that existing trademark holders have priority to use the trademark.

Extended information:

Composition:

The letters that constitute a trademark refer to the smallest writing unit of Pinyin characters or phonetic symbols, including Pinyin characters and foreign letters. Such as English letters, Latin letters, etc.

The original Trademark Law classified trademarks consisting only of letters into the category of word trademarks. However, in the newly revised Trademark Law in 2001, letters were regarded as one of the constituent elements of a trademark. This provision has changed. It is in line with reality and also facilitates the trademark authorities to review and approve trademark registration applications in accordance with the law.

Numbers as components of trademarks are also new provisions of the 2001 Trademark Law. The numbers constituting the trademark can be either Arabic numerals or Chinese uppercase numerals.

As a three-dimensional mark that constitutes a trademark, it can also be called a three-dimensional mark. It is a three-dimensional mark with three dimensions: length, width and height. A trademark logo composed of a three-dimensional logo is called a three-dimensional trademark. It is different from the trademark pattern that we usually see on a flat surface, but appears in a three-dimensional material form.

Baidu Encyclopedia-Trademark