| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Australia | 3 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 | |
| #4 | China | 1 | |
| #5 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Control |
| # | Technology | |
|---|---|---|
| #1 | Teaching materials | |
| #2 | Radio navigation | |
| #3 | Measuring distances |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dufek Otto K | 11 |
| Publication | Filing date | Title |
|---|---|---|
| AU2002317692A1 | Method for preparing learning matter and corresponding sound transmission device | |
| DE10140369A1 | Learning matter preparation method allows material stored on DVD or CD to be repeated continuously | |
| DE10130573A1 | Learning matter preparation method allows material stored on DVD or CD to be repeated continuously | |
| AU6819700A | Learning device | |
| AU6148800A | Optical device |