| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 | |
| #2 | France | 12 | |
| #3 | Denmark | 5 | |
| #4 | United Kingdom | 1 | |
| #5 | Greece | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Electrical machinery and energy | |
| #3 | Environmental technology | |
| #4 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartmann Willy | 11 |
| #2 | Kraus Otto | 1 |
| #3 | Kopp Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR879900A | Drive device for portable magneto electric lamps | |
| GB527278A | Improvements in and relating to headlights for cycles and motor cycles |