| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 8 | |
| #2 | Australia | 2 | |
| #3 | Canada | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | United States | 2 | |
| #6 | WIPO (World Intellectual Property Organization) | 2 | |
| #7 | Denmark | 1 | |
| #8 | Finland | 1 | |
| #9 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Rotary-pistons | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henriksen Leif Dag | 16 |
| #2 | Henriksen Leif D | 4 |
| #3 | Henriksen Tom | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5201644A | Valve arrangement for pump or compressor | |
| CA2045558A1 | Arrangement of pumps or similar machines | |
| WO8905918A1 | Valve arrangement for pump or compressor |