Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D422033 | Electronic learning aid housing | Maisy Min-Shih Wai | 2000-03-28 |
| D413149 | Electronic learning aid housing | Sannie L. S. Chan | 1999-08-24 |
| D407748 | Electronic educational game housing | Ivy W. M. Yiu | 1999-04-06 |
| D360224 | Housing for an electronic instructional game apparatus | Chi K. W. Chow, Chung P. C. Lau | 1995-07-11 |
| D358421 | Electronic educational activity toy | Chi K. W. Chow | 1995-05-16 |
| D353566 | Walker | Chi K. W. Chow | 1994-12-20 |
| 5362272 | Activity toy and walker device | Chi K. W. Chow | 1994-11-08 |
| D350373 | Housing for an electronic instructional game apparatus | Chi K. W. Chow, Chung P. C. Lau | 1994-09-06 |
| 4250570 | Redundant memory circuit | Gregory A. Kannal, Marcian E. Hoff, Jr. | 1981-02-10 |