| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | IT methods for management | |
| #3 | Control | |
| #4 | Digital networks |
| # | Technology | |
|---|---|---|
| #1 | Broadcast communication | |
| #2 | Data processing systems | |
| #3 | Coin-freed | |
| #4 | Digital information transmission | |
| #5 | Telephonic communication | |
| #6 | Wireless communication networks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chan Hark C | 18 |
| Publication | Filing date | Title |
|---|---|---|
| US2011247034A1 | Information distribution and processing system | |
| US7814212B1 | Data delivery system using local and remote communications | |
| US7699217B1 | Authentication with no physical identification document | |
| US7369824B1 | Receiver storage system for audio program | |
| US7403753B1 | Receiving system operating on multiple audio programs | |
| US7278064B1 | Information delivery system | |
| US7245707B1 | Data network based telephone messaging system |