On Defense to Invention or Utility Model Patent Infringement

Patent infringement is one of the core contents of the patent law.This paper elaborates the 11 ways of allegations against the patent infringement:don't falling into the scope of the patent protection,existing technology,prior use right,no-fault,Exhaustion Doctrine,not for the business purposes,temporary non productive transit,scientific research,and to require the use of administrative examination and approval,the limitation of action.Where-after,the paper discusses how to avoid the misunderstanding and wrong practices.