| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Brazil | 2 | |
| #3 | Canada | 2 | |
| #4 | China | 2 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | Republic of Korea | 2 | |
| #7 | United States | 2 | |
| #8 | WIPO (World Intellectual Property Organization) | 2 | |
| #9 | Israel | 1 | |
| #10 | India | 1 | |
| #11 | Mexico | 1 | |
| #12 | Singapore | 1 | |
| #13 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Electric digital data processing | |
| #2 | Image data processing | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Estes Mark D | 18 |
| #2 | Walker John Powell | 9 |
| #3 | Walker John P | 2 |
| #4 | Estes Mark Duane | 1 |
| #5 | John Powell Walker | 1 |
| #6 | Mark D Estes | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5189416A | Chordal keyboard method and apparatus | |
| US5301284A | Mixed-resolution, N-dimensional object space method and apparatus |