| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | Norway | 3 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pipes | |
| #3 | Installation of electric cables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bokenkamp Donald G | 7 |
| #2 | Bokenkamp D G | 3 |
| #3 | Bokenhamp Donald G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1009855A | Pipe laying system | |
| US3981369A | Riser pipe stacking system | |
| US3934647A | Pipe laying system | |
| US3895677A | Riser pipe stacking method | |
| US3877583A | Pipe racking system |