| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | United States | 4 | |
| #3 | Australia | 1 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Metal-working | |
| #4 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Somerville Francis S | 6 |
| #2 | Eiber Robert J | 3 |
| #3 | Park Donald M | 3 |
| #4 | Wassell Gordon C | 2 |
| #5 | Johnson David L | 2 |
| #6 | Grose Ronald D | 2 |
| #7 | Jones Brian L | 2 |
| #8 | Grose Ronald Duane | 1 |
| #9 | Johnson David Lewis | 1 |
| #10 | Wassell Gordon Colliss | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU8095882A | Installing crack arrestor on pipes | |
| CA1152907A | Out of contact highly geometrical crack arrestor | |
| CA1104955A | Crack arrestor | |
| CA1092534A | Crack arrestor | |
| US4180104A | Out of contact highly geometrical crack arrestor | |
| CA1068623A | Crack arrestor | |
| US4148127A | Method of applying a bond-type crack arrestor to a pipe section of a pipeline |