| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 14 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Surface technology and coating | |
| #3 | Chemical engineering | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Metal-working | |
| #3 | Cleaning | |
| #4 | Coating metallic material | |
| #5 | Metallic material cleaning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zhu Suzhen | 12 |
| #2 | Tang Goudu | 10 |
| #3 | Tang Shuanglong | 2 |
| Publication | Filing date | Title |
|---|---|---|
| CN111763936A | Pre-passivation treatment process for inner wall of seamless smooth copper pipe | |
| CN111975307A | Small-diameter high-pressure-resistant copper pipe and production method thereof | |
| CN103498840A | Clamping device | |
| CN103480698A | Straightening device | |
| CN103486385A | Four-way pipe connector | |
| CN103486397A | Pipeline plugging device | |
| CN103486342A | Copper pipe | |
| CN103486369A | Spherical connector | |
| CN103486398A | Plugging device | |
| CN103486343A | Copper pipe having good rigidity | |
| CN103486399A | Plugging device | |
| CN103486350A | Anti-corrosion pipeline | |
| CN103486116A | Corner connector | |
| CN103480615A | Pipeline cleaner |