| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Engines, pumps and turbines | |
| #3 | Basic materials chemistry | |
| #4 | Mechanical elements | |
| #5 | Agriculture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Haag Franz | 3 |
| #2 | Huber Ludwig | 2 |
| #3 | Duerr Dipl-Ing Walter | 2 |
| #4 | Durr Walter | 2 |
| #5 | Huber Dipl-Ing Dr Ludwig | 1 |
| #6 | Huber Ludwig Dipl-Ing Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE845291C | Non-return valve with flexible circular disc clamped in the middle | |
| DE833548C | Oscillating burner device | |
| DE829778C | Oscillating burner | |
| CA505345A | Burner devices | |
| CA512514A | Pyrophoric burners |