For the Inventor, By the Inventor

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Xi an, Shan Xi, China

Cnpc Tubular Goods Research Institute

USPTO Granted Patents = 3

EPO Patents = 1

Forward Citations = 1

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5 inventors (with patents filed for the assignee):

Yonggang Liu (3 out of 4 patents)

Fangpo Li (3 out of 3 patents)

Xiaojun Li (2 out of 3 patents)

4. Chun Feng (2 out of 2 patents)

5. Qi Shi (1 out of 2 patents)

6. Peng Wang (95 patents)

7. Jiandong Wang (7 patents)

8. Xinhu Wang (0 patent)

9. Lihong Han (0 patent)

3 patents: Sort by Forward Citations

1. 10196863 - Connection structure between pipe body and steel joint of aluminum alloy drill pipe (2019-02-05),

2. 10184596 - Connection structure between pipe body and joint of aluminum alloy drill pipe (2019-01-22),

3. 10036213 - Connection structure between pipe body and joint of aluminum alloy drill pipe (2018-07-31),

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USPTO Data Jan 1 1976 - Dec 23 2025

3 Patents

#1 in Xi an, Shan Xi

#2,503 in China

Xi an, Shan Xi, China

Cnpc Tubular Goods Research Institute

Forward Citations = 1

5 inventors:

Yonggang Liu (3 out of 4 patents)

Fangpo Li (3 out of 3 patents)

Xiaojun Li (2 out of 3 patents)

4. Chun Feng (2 out of 2 patents)

5. Qi Shi (1 out of 2 patents)

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