Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074736 | Pneumatic tool with an improved soundproof device | Chuan-ching Cheng | 2011-12-13 |
| 7878886 | Pneumatic grinder with an improved air intake control apparatus | Chuan-ching Cheng | 2011-02-01 |