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Patents Grantslast 30 patents

Information Patent Grant
Integrated detection test device for drill bit and rotary blowout p...
- Patent number 12,174,082
- Issue date Dec 24, 2024
- Sichuan Hongda Security Technology Service Co., Ltd
- Yonggang Deng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multifunctional rotary blowout preventer test device and method the...
- Patent number 12,163,856
- Issue date Dec 10, 2024
- Sichuan Hongda Security Technology Service Co., Ltd
- Shundong Tang
- E21 - EARTH DRILLING MINING