| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Sweden | 2 | |
| #3 | United States | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Argentina | 1 | |
| #6 | Brazil | 1 | |
| #7 | Canada | 1 | |
| #8 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Dredging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Quarfordt Per Ulf Torgny | 6 |
| #2 | Karlsson Kjell | 4 |
| #3 | Quarfordt | 1 |
| #4 | Torgny Per Ulf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU7087698A | Tooth arrangement | |
| BR9612786A | Tooth arrangement. | |
| WO9822664A1 | Tooth arrangement | |
| US5802752A | Tooth arrangement for excavator |