Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12214394 | Mold for preparing large-size rare earth magnesium alloy ingot without tail shrinkage by back pressure severe plastic deformation | Zhimin Zhang, Jianmin Yu, Zhe Chen, Zhen Wang | 2025-02-04 |
| 11872608 | Method of removing sludge from a drain pipe | Kuo-Chung Cheng | 2024-01-16 |
| 11813653 | Method for preparing large-size rare earth magnesium alloy high-performance ingots by short process severe plastic deformation | Zhimin Zhang, Jianmin Yu, Zhen Wang, Zhe Cheng | 2023-11-14 |
| 10265746 | Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billet | Zhimin Zhang, Jianmin Yu, Qiang Wang, Guojun Li | 2019-04-23 |
| 5304248 | Passive shield for CVD wafer processing which provides frontside edge exclusion and prevents backside depositions | David Cheng | 1994-04-19 |
| 5112435 | Materials and methods for etching silicides, polycrystalline silicon and polycides | David N. Wang, Toung K. Leong, deceased | 1992-05-12 |
| 4668338 | Magnetron-enhanced plasma etching process | Dan Maydan, Sasson Somekh, David Cheng | 1987-05-26 |