| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | Switzerland | 4 | |
| #3 | Austria | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Denmark | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Spain | 1 | |
| #8 | France | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Consumer goods | |
| #3 | Chemical engineering | |
| #4 | Machine tools | |
| #5 | Transport | |
| #6 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Doll Ludwig | 10 |
| #2 | Ludwig Doll | 2 |
| #3 | Doll Rene | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE19921793A1 | Hygienic toilet | |
| DE3328174A1 | TOILET SEAT WITH A MATCHED PAD OR SIMILAR DISPOSAL MATERIAL | |
| GB294459A | Device for mashing potatoes and the like | |
| GB239115A | Improvements in or relating to devices for sharpening pencils and the like |