Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6267523 | Ink pen refill with diversely colored gel ink layers and method of manufacture | Sin-Hwa Huang | 2001-07-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6267523 | Ink pen refill with diversely colored gel ink layers and method of manufacture | Sin-Hwa Huang | 2001-07-31 |