In the lawsuit, Noah was accused of infringing VANHON's patent No. ZL200420003299.8 entitled digital pronunciation device. According to the decision, Noah was ordered to stop manufacturing and selling of its NP12 DLD products, and to pay 500,000 Renminbi yuan to VANHON.
VANHON is the developer of the technology of the digital pronunciation device. Its patent was granted in 2005. Since then, VANHON had done a lot of negotiations with companies infringing its patents but with few results. However, due to Noah's enormous advertising campaigns on TV and news media, Noah's DLD products has won more and more public attention, as a result of which Noah sales revenue increased rapidly.