| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | United Kingdom | 2 | |
| #3 | Israel | 2 | |
| #4 | United States | 2 | |
| #5 | Australia | 1 | |
| #6 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Computer technology | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Television | |
| #2 | Teaching materials | |
| #3 | Electric digital data processing | |
| #4 | Data recognition and presentation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Groom Carl M | 2 |
| #2 | Reiffel Leonard | 2 |
| #3 | Leonhard Reiffel Dr | 2 |
| #4 | Reiffel L | 1 |
| #5 | Leonard Reiffel | 1 |
| #6 | Leonard Reiffel Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU5138773A | Superimposed television display system having a pre-programm-ed symbol generator | |
| US3718759A | Audio-visual teaching system and student response apparatus | |
| DE1958000A1 | Audio-visual teaching system | |
| DE1958001A1 | Audio-visual teaching system | |
| GB1293403A | Improvements in or relating to visual display systems | |
| US3617630A | Superimposed dynamic television display system |