Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460531.8 Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460677.2 Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460488.5 Issue Date: 2017-11-16 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: MANAGEMENT SYSTEM CERTIFICATE Number: 2792110Q10635R0S Issue Date: 2021-10-27 Expiry Date: 2024-10-26 Scope/Range: Design, Manufacturing, Sales of Petroleum Machinery Equipment(PDC Bit); Sales of Super Hard Materials (Diamond Composite) Issued By: Bejing EMIE-CYBER Inspection Certification Co., Ltd.

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460678.7 Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460677.2 Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460489.X Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460488.5 Issue Date: 2017-11-16 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: Utility Model Patent Certificate Number: ZL 2017 2 0460679.1 Issue Date: 2017-04-28 Scope/Range: Issued By: China National Intellectual Property Administration

Standard: MANAGEMENT SYSTEM CERTIFICATE Number: 2792110S10635R0S Issue Date: 2021-10-27 Expiry Date: 2024-10-26 Scope/Range: Design, Manufacturing, Sales of Petroleum Machinery Equipment(PDC Bit); Sales of Super Hard Materials (Diamond Composite) Issued By: Bejing EMIE-CYBER Inspection Certification Co., Ltd.

Standard: MANAGEMENT SYSTEM CERTIFICATE Number: 2792110E10635R0S Issue Date: 2021-10-27 Expiry Date: 2024-10-26 Scope/Range: Design, Manufacturing, Sales of Petroleum Machinery Equipment(PDC Bit); Sales of Super Hard Materials (Diamond Composite) Issued By: Bejing EMIE-CYBER Inspection Certification Co., Ltd.