其次重点归纳了有关专利无效宣告程序性质的几种学说，并逐一进行分析，得出专利无效宣告程序实则为民事确权。
Then the thesis summarizes relevant patent invalidation of several theories, and one for the invalidation of the patent fact procedure of civil counterpoising truly.
其次阐述了专利无效宣告的特征与功能。
Secondly it elaborates the invalidation of the patent characteristics and functions.
第四章专利申请的复审与专利权的无效宣告
Chapter IV Reexamination of Patent Application and Invalidation of Patent Right