| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 | |
| #2 | Austria | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Transport | |
| #3 | Packaging and shipping |
| # | Name | Total Patents |
|---|---|---|
| #1 | Boysen Friedrich | 15 |
| #2 | Horstmann Dipl-Ing Karl | 1 |
| #3 | Santiago-Fernandez Andres | 1 |
| #4 | Fernandes Andres Santiago | 1 |
| #5 | Boysen Friedrich A | 1 |
| #6 | Friedrich Boysen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1267908B | Exhaust silencer combined with a heating device | |
| DE1268435B | Exhaust gas cooling system combined with a silencer | |
| GB999333A | Improvements in or relating to catalytic engine exhaust gas oxidation devices | |
| GB963062A | Improvements in or relating to catalytic engine exhaust gas burning devices | |
| DE1077085B | Arrangement for sound absorption of the exhaust system of internal combustion engines in motor vehicles and the like. like |