OTC: Over-the-counter drugs (commonly known as OTC drugs) refer to those drugs that consumers can buy directly at pharmacies or pharmacies without a doctor's prescription. Over-the-counter drugs, converted from prescription drugs, are drugs with long-term application, confirmed efficacy, stable quality and safety for non-medical professionals. In China, the trademark on the trademark also has its special meaning. In fact, TM logo does not protect trademarks. Different from R. TM, it means that the trademark has been applied to the State Trademark Office, which has issued a notice of acceptance and entered an objection period. This can prevent others from applying repeatedly, and it also means that existing trademark holders have the priority of use. In HTML,? 6? 4 use? Display, r use? Show. R is the mark of "registered trademark", which means that the trademark has applied for registration in the State Trademark Office and has been approved by the Trademark Office to become a registered trademark. ? It is the initials of English register registration. Registered trademarks have the characteristics of exclusiveness, exclusiveness and uniqueness. It belongs to the registered trademark owner and is protected by law. Without the permission or authorization of the registered trademark owner, no enterprise or individual may use it, otherwise it will bear tort liability. The use of TM is a trademark symbol, that is, words, graphics or symbols marked with TM are trademarks, but they are not necessarily registered (unregistered ones are not protected by law). TM is the abbreviation of English trademark. Common superscript symbols? 6? 4 means, for example: good girl? 6? 4。