| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | Denmark | 3 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | WIPO (World Intellectual Property Organization) | 3 | |
| #5 | United States | 2 | |
| #6 | Brazil | 1 | |
| #7 | Canada | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Poland | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Gas-flow silencers for machines | |
| #2 | Climate change mitigation in transportation | |
| #3 | Separation | |
| #4 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frederiksen Svend | 15 |
| #2 | Frederiksen Lars | 10 |
| #3 | Schoubye Peter Carl Sehested | 5 |
| #4 | Frederiksen Eyvind | 5 |
| #5 | Frederiksen E | 1 |
| #6 | Lund Agner | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK57996A | Muffler | |
| PL322747A1 | Combined heat exchanger and sound damping device | |
| WO9636796A1 | A silencer with incorporated catalyst | |
| DK11293D0 | Muffler | |
| US3897853A | Silencer | |
| GB1372908A | Silencers |