| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 21 | |
| #2 | Sweden | 8 | |
| #3 | USSR (Union of Socialist Soviet Republics) | 5 | |
| #4 | Germany | 1 | |
| #5 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Engines, pumps and turbines | |
| #4 | Civil engineering | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Gas-flow silencers for machines | |
| #2 | Air-conditioning | |
| #3 | Burners | |
| #4 | Pumps | |
| #5 | Vehicle air-treating devices | |
| #6 | Lubricating of machines | |
| #7 | Doors and windows | |
| #8 | Internal-combustion piston engines | |
| #9 | Feeding fuel to combustion device | |
| #10 | Fire-fighting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kofink S | 5 |
| #2 | Firma Eberspaecher J | 4 |
| #3 | Rajzer Peter | 3 |
| #4 | Bock Hans Joachim Dipl Ing | 2 |
| #5 | Gerwin Reinhard | 2 |
| #6 | Langen Kherbert | 2 |
| #7 | Moring Fritts | 2 |
| #8 | Reuter Fritz | 1 |
| #9 | Hettich A | 1 |
| #10 | Gajzert Gerkhard | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH573045A5 | Tubular exhaust gas noise silencer - has concentric tubes with resonator chamber and perforated inner tube | |
| DE2137960A1 | EXHAUST SILENCER FOR MULTI-CYLINDER COMBUSTION MACHINERY |