| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | France | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Furniture and games | |
| #3 | Consumer goods | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Teaching materials | |
| #2 | Games | |
| #3 | Electrophonic musical instruments | |
| #4 | Footwear features | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Liu Hsing-Ching | 11 |
| #2 | Liu Lan-Dih | 6 |
| #3 | Liu Hsing Ching | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB8430969D0 | Question-and-answer device | |
| US4182052A | Educational toy | |
| US4135313A | Educational toy with action | |
| US4118877A | Educational toy | |
| FR2371947A1 | EDUCATIONAL GAME | |
| US4043241A | Musical shoe | |
| US4027402A | Novel educational toy | |
| US4024650A | Educational toy | |
| US4012849A | Educational quiz and answer toy | |
| US4033051A | Educational toy | |
| US3994078A | Educational toy clock with action | |
| US3886671A | Linguistic self learning device | |
| US3902256A | Educational quiz and answer toy with action |