| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Consumer goods | |
| #6 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gerhard Otto | 11 |
| #2 | Otto Gerhard | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1579884B1 | Wall niche or ceiling niche radiators | |
| DE1050981B | Tubular heater with air ducts | |
| DE1045622B | Tubular heater with vertical air channels |