Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7208670 | System to enable the use of white keys of musical keyboards for scales | Wong Hoo Sim, Kok Liang Lim | 2007-04-24 |
| 7105738 | Functional performance of keyboard musical instruments | Wong Hoo Sim, Kok Liang Lim | 2006-09-12 |