| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 9 | |
| #2 | France | 2 | |
| #3 | Germany | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Audio-visual technology | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Special information storage | |
| #3 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Promundo Treuunternehmen | 9 |
| #2 | Handschin Max G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB721448A | Telephonograph with answering device |