1.
Procedure of invalidation of patent right / Yuanguo Zhao.
Zhao, Yuanguo, author.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1986.
English | 7 CN |
Detailed record - Similar records
2.
China's patent reexamination and invalidation in 1990 / Yuanguo Zhao.
Zhao, Yuanguo, author.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1991.
English | 7 CN |
Detailed record - Similar records