| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 5 | |
| #2 | Austria | 2 | |
| #3 | United States | 2 | |
| #4 | Germany | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Consumer goods | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ledermann Hugo | 6 |
| #2 | Hugo Ledermann | 2 |
| Publication | Filing date | Title |
|---|---|---|
| EP0320801A1 | Clothes peg | |
| CH632080A5 | Heat pump installation | |
| CH566527A5 | Heat pump for room heating - has condenser and evaporator which are fitted into the hot water storage tank | |
| DE2447505A1 | HEAT PUMP SYSTEM FOR ROOM HEATING WITH HOT WATER |