| 1 | Anti vibration groove | Zhejiang Zhengkang | Design Patent | 2.02E+12 | 12/21/16 |
| 2 | Anti vibration groove connector for pipeline | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 01/18/17 |
| 3 | High strength tensile mechanical compression type pipe joint | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 09/21/16 |
| 4 | Tensile elastic ring | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 09/21/16 |
| 5 | Special joint for gas | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 09/21/16 |
| 6 | Self sealing ring | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 11/23/16 |
| 7 | Warm jacket (45 degree elbow) | Zhejiang Zhengkang | Design Patent | 2.02E+12 | 07/20/16 |
| 8 | Articulated bellows | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/27/16 |
| 9 | Stainless steel pipe warm jacket | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/27/16 |
| 10 | A new type of metal pipe fitting | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/27/16 |
| 11 | Three way warm jacket | Zhejiang Zhengkang | Design Patent | 2.02E+12 | 07/27/16 |
| 12 | Warm jacket (90 degree elbow) | Zhejiang Zhengkang | Design Patent | 2.02E+12 | 07/27/16 |
| 13 | Direct thermal cover | Zhejiang Zhengkang | Design Patent | 2.02E+12 | 09/07/16 |
| 14 | Thin wall compression type metal pipe fitting type O sealing ring | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 08/05/15 |
| 15 | Internal expansion type stainless steel pipe mouth shaping device | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 08/05/15 |
| 16 | Full automatic stainless steel pipe high pressure water pressure testing machine | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 08/05/15 |
| 17 | An elbow pipe automatic flat head machine | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 08/05/15 |
| 18 | Full automatic steel pipe air tightness detecting machine | Zhejiang Zhengkang | Invention Patent | 2.02E+12 | 03/02/16 |
| 19 | Full automatic steel pipe air tightness detection device | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 06/25/14 |
| 20 | Loading device of full automatic steel pipe air tightness testing machine | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/16/14 |
| 21 | Material distributing device of full automatic steel pipe air tightness detecting machine | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/16/14 |
| 22 | Multi-station semiautomatic fitting former | Zhejiang Zhengkang | Invention Patent | 2.02E+12 | 08/26/15 |
| 23 | Double-cone double-clamp metal pipeline connecting piece | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 12/18/13 |
| 24 | Semi-automatic multi-station pipe fitting forming machine | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 12/18/13 |
| 25 | Pressing Former of Metal Pipe Fitting | Zhejiang Zhengkang | Invention Patent | 2.02E+12 | 05/06/09 |
| 26 | Convex-ring-free self-locking and hermetic-connecting device for thin-walled stainless steel pipe | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 01/11/12 |
| 27 | LGSSP connecting piece without bulge loop and adopting self-locking sealing | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 02/15/12 |
| 28 | Inner lining clamping press composite tube connecting pieces | Zhejiang Zhengkang | Utility Models Patent | 2.02E+12 | 07/23/08 |
