YH

Yao Ha

Overall (All Time): #1,416,352 of 4,157,543Top 35%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11366084 Ultrasonic flaw detector test block Changhua Chen, Li Zhang, Hong Mei Zhang, Zhengmao Xu, Zheng Dong +2 more 2022-06-21
11045888 Portable wire cutting device for sampling steel ingot Lingjun He, Changhua Chen, Hong Mei Zhang, Li Zhang, Leijun Song +6 more 2021-06-29
9810667 Heel test block Changhua Chen, Li Zhang, Xiaolei Liu, Zhengmao Xu, Zheng Dong +1 more 2017-11-07