What is the practice on patent marking in China?
Patent marking is not compulsory in China, but may be done in accordance with the “Regulation on Affixing of Patent Marking and Patent Number” effective since 1 July 2003. According to these regulations, the type of patent must be specified in Chinese and the number of the patent application or patent issued by the Chinese Patent Office (SIPO) must be indicated correctly. If this does not answer your question, please specify your request.
