| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 7 | |
| #2 | Germany | 6 | |
| #3 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Control | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Siphons | |
| #3 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Strub Fritz Dipl Ing | 3 |
| #2 | Strub Fritz | 3 |
| #3 | Fritz Strub | 3 |
| #4 | Strub Fritz Dipl-Ing | 2 |
| #5 | Hubert Zingerle | 1 |
| #6 | Zingerle Oesterreicher Hubert | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH536653A | Alluvial layer filter - with internal deflector plates for uniform distribution | |
| DE1964313A1 | Filter candle | |
| DE1944841A1 | Injection pump in the feed line of a precoat filter | |
| DE1944438A1 | Process for cleaning clogged filter candles and device for carrying out the process | |
| DE1924880A1 | Device for residual filtration of liquids | |
| DE1782188A1 | Frame for sheet filter |