Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D523974 | Fiber optic night light | — | 2006-06-27 |
| D523975 | Bubble night light | — | 2006-06-27 |
| 6390237 | Ladder step stool with latch | Wan Soo Kim, Ping-Jan Chiu, Franny Chen | 2002-05-21 |
| D416092 | 2-step ladder | — | 1999-11-02 |
| D414879 | 3-step ladder | — | 1999-10-05 |
| D410550 | Project ladder | — | 1999-06-01 |