| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Furniture and games | |
| #3 | Consumer goods | |
| #4 | Computer technology | |
| #5 | Control | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Office furniture | |
| #3 | Filing and indexing | |
| #4 | Electric digital data processing | |
| #5 | Teaching materials | |
| #6 | Doors and windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sperber Georg | 4 |
| #2 | Donner Franz Josef | 1 |
| #3 | Schilling Harry | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE19719828A1 | Test method for projection device | |
| EP0742475A2 | Projection screen of stiff but flexible film | |
| DE19543959A1 | Computerized projection device | |
| DE19516915A1 | Projection screen of vertical laminations | |
| DE19516189A1 | Projection screen | |
| DE19508393A1 | flipchart | |
| DE4421745A1 | Projection screen |