| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | EPO (European Patent Office) | 5 | |
| #3 | Australia | 3 | |
| #4 | Canada | 3 | |
| #5 | Hong Kong | 3 | |
| #6 | China | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Swimming pools | |
| #2 | Toys | |
| #3 | Furniture for children |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wu Lai-Ha | 18 |
| #2 | Chu Wan-Sing | 18 |
| #3 | Wu Lai Ha | 3 |
| #4 | Chu Wan Sing | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2007079858A1 | Collapsible structure | |
| EP1741366A2 | Collapsible structures adapted for child use | |
| HK1069718A2 | Collapsible structure. | |
| US2005217713A1 | Collapsible structure | |
| HK1060017A2 | Pop up collapsible structures | |
| US2003196690A1 | Convertible play structure |