| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 10 | |
| #2 | Germany | 1 | |
| #3 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Furniture and games | |
| #5 | Optics | |
| #6 | Chemical engineering | |
| #7 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Horticulture | |
| #3 | Percussive tools | |
| #4 | Games | |
| #5 | Frames | |
| #6 | Separation | |
| #7 | Optical systems | |
| #8 | Nails | |
| #9 | Workshop equipment | |
| #10 | Toys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hans Landolt | 9 |
| #2 | Landolt Hans | 2 |
| #3 | Walter Landolt | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3109240A1 | Separator | |
| CH602150A5 | Plastics electrostatic educational toy | |
| ES174417A1 | Mechanical device for propaganda in escaparates |