| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 8 | |
| #2 | United States | 4 | |
| #3 | Norway | 3 | |
| #4 | Poland | 2 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Digital networks |
| # | Technology | |
|---|---|---|
| #1 | Selecting | |
| #2 | Digital information transmission | |
| #3 | Multiplex communication | |
| #4 | Telephonic communication |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duree Albert Daniel | 7 |
| #2 | Wiley William Lyle | 5 |
| #3 | Gardner Michael Joseph | 5 |
| #4 | Christie Joseph Michael | 5 |
| #5 | Gardner M J | 4 |
| #6 | Nelson Tracy Lee | 3 |
| #7 | Christie Joseph M | 3 |
| #8 | Christie J M | 3 |
| #9 | Duree A D | 2 |
| #10 | Nelson T L | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US6229803B1 | Telecommunications provider agent | |
| US6215866B1 | System for handling large blocks of special number calls in a telecommunications network | |
| US6188753B1 | Method and apparatus for detection and prevention of calling card fraud |