| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | United States | 3 | |
| #4 | WIPO (World Intellectual Property Organization) | 3 | |
| #5 | Brazil | 2 | |
| #6 | China | 2 | |
| #7 | Republic of Korea | 2 | |
| #8 | Argentina | 1 | |
| #9 | Mexico | 1 | |
| #10 | Norway | 1 | |
| #11 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Dredging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Calderwood James A | 21 |
| Publication | Filing date | Title |
|---|---|---|
| EP2510161A1 | A ripper boot including a male carrier and a replaceable female tooth | |
| CA2636939A1 | A surface engaging tool including high tensile inserts | |
| BRPI0715797A2 | improved scarifier protector including a highly tensioned tip | |
| KR20080043343A | An improved ripper boot | |
| CN101278093A | An improved ripper boot |