Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5219249 | Reinforced concrete load-bearing pile forming device | Zhang Junsheng | 1993-06-15 |
| 5122013 | Reinforced concrete load-bearing pile with multi-branches and enlarged footings, and means and method for forming the pile | Zhang Junsheng | 1992-06-16 |