| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 4 | |
| #2 | Australia | 2 | |
| #3 | Canada | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | United States | 1 |
| # | Technology | |
|---|---|---|
| #1 | Hand carts | |
| #2 | Vehicle wheels | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dull Clinton Anthony | 8 |
| #2 | Dull Graham | 5 |
| #3 | Dull Graham Lloyd | 5 |
| #4 | Trainor Mathew Keith | 3 |
| #5 | Anthony Dull Clinton | 1 |
| #6 | Graham Dull | 1 |
| #7 | Keith Trainor Mathew | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2020041824A1 | Castor wheel assembly | |
| AU2013337582A1 | Castor wheel assembly | |
| WO2008113116A1 | Trolley with a guide wheel | |
| EP1750989A1 | Trolley with a swivable guide wheel | |
| AU2005237657A1 | Trolley with a swivable guide wheel |