| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 3 | |
| #2 | Norway | 3 | |
| #3 | Germany | 2 | |
| #4 | Canada | 1 | |
| #5 | Finland | 1 | |
| #6 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Burkhardt Margarete | 9 |
| #2 | Huisman Hidde Cornelis | 2 |
| #3 | Burkhardt Heinz Wolfgang | 2 |
| Publication | Filing date | Title |
|---|---|---|
| WO9522277A1 | Cleaning device | |
| EP0641539A1 | Cleaning product | |
| DE4414074A1 | Cleaning device for floors etc. | |
| EP0546426A1 | Surfaces cleaning and polishing article | |
| DE4023345A1 | Device for cleaning surfaces |