Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6637481 | Apparatus for sharpening a writing instrument | King Biu Mak, Chung Ming Mak | 2003-10-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6637481 | Apparatus for sharpening a writing instrument | King Biu Mak, Chung Ming Mak | 2003-10-28 |