| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 16 | |
| #2 | Germany | 4 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Agriculture | |
| #4 | Electrical machinery and energy | |
| #5 | Chemical engineering | |
| #6 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Centrifuges | |
| #2 | Venting or aerating devices | |
| #3 | Dairy products production | |
| #4 | Gearing | |
| #5 | Rotary-pistons | |
| #6 | Separation | |
| #7 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Egg Karl | 7 |
| #2 | Cham Ag Maschinenfabrik | 4 |
| #3 | Hubmann Paul | 3 |
| #4 | Paul Hubmann | 3 |
| Publication | Filing date | Title |
|---|---|---|
| DE1136942B | Screw centrifuge | |
| DE1117498B | Screw centrifuge | |
| DE1103854B | Continuously working solid bowl centrifuge | |
| GB458554A | Improvements in or relating to regulable through cocks | |
| DE654636C | Peeling device for centrifugal machines |