When coming to patent infringement litigation, valid patent, infringement evidence, eligibility of plaintiff and defendant are all essential elements. What happens if the former three elements are well prepared, but the infringer appears to be an underground workshop without business registration? Let's look at an example below.

Comyan Lighting Electrical Appliance Co., Ltd is a high-tech company which is specializing in manufacturing many kinds of electric light source products. In 2011, Comyan received a court summon from Jiangmen Intermediate People’s Court and was accused of infringing the utility model patent right of another Guangdong company about the production of a quartz disinfecting bulb. Therefore, Comyan entrusted Jiaquan IP Law Firm with responding to the suit.