Legal Analysis: Available. It can be used without registration, but it is not protected by law and cannot be marked with R. The TM mark can be marked between the receipt of the acceptance notice and the successful registration of the trademark. However, pharmaceutical trademarks are an exception. According to legal regulations, registered trademarks must be used on drugs. Therefore, it can be used during trademark review.

Legal basis: Article 39 of the "Trademark Law of the People's Republic of China" The validity period of a registered trademark is ten years, calculated from the date of approval of registration.