Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481492 | Heat exchanger tube, a method for making the same, and a cracking furnace or other tubular heat furnaces using the heat exchanger tube | Zhi Zheng, Qingquan Zeng, Ning Xiuzhen, Lou Langhong, Shiqun Xu +2 more | 2002-11-19 |