| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 3 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | Spain | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Australia | 1 | |
| #6 | Canada | 1 | |
| #7 | Denmark | 1 | |
| #8 | Finland | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | Norway | 1 | |
| #11 | United States | 1 | |
| #12 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Registering devices | |
| #2 | Telephonic communication |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bille D | 7 |
| #2 | Bille Dag | 6 |
| #3 | Dag Bille | 2 |
| Publication | Filing date | Title |
|---|---|---|
| WO8102235A1 | An electronic telephone call debiting meter for a subscriber's telephone set | |
| US4358777A | Device for recording and handling of information regarding time and activities | |
| GB2082022A | A device for detecting signals on a telephone network |