Is there any difference between upper and lower case in Chinese and English in trademark registration? Answer: Is there a difference between uppercase and lowercase letters in trademark registration? Is it enough to only register lowercase letters or do you need to register and apply for both? There is no distinction between uppercase and lowercase trademarks, because as long as you register lowercase words or lowercase English, it is impossible for others to register successfully in uppercase English. This will constitute a similar trademark. Under normal circumstances, if you register a word trademark, you do not need to register it together, and it is impossible to register it. Identical word trademarks means that the trademarks use the same language, and the text composition and arrangement order are exactly the same. If there are slight differences between two trademarks due to the difference in fonts, capitalization of letters, or the arrangement of words in horizontal or vertical format, they will still be determined to be the same trademark.