| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | United States | 3 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Norway | 2 | |
| #6 | Sweden | 2 | |
| #7 | Switzerland | 1 | |
| #8 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Teaching materials | |
| #2 | Advertising | |
| #3 | Registering devices | |
| #4 | Time tables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Berge Arthur | 11 |
| #2 | Arthur Berge | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2525843A1 | INFORMATION HANDLING DEVICE | |
| US3981090A | Apparatus for displaying changeable arrangements of indicia | |
| DE2418305A1 | PLANNING DEVICE | |
| US3680525A | Program display device | |
| GB1201197A | Improvements in or relating to visual display devices | |
| GB1032941A | Improvements relating to indicating devices |