| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | United Kingdom | 10 | |
| #3 | United States | 4 | |
| #4 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Audio-visual technology | |
| #3 | Control | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Processing photographic materials | |
| #3 | Special information storage | |
| #4 | Teaching materials | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wells Leon W | 6 |
| #2 | Weliczker Wells Leon | 5 |
| #3 | W Wells Leon | 4 |
| #4 | Weliczker Welss Leon | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1186593A | Sound Reproducing System | |
| US3408019A | Film cartridge | |
| FR1460887A | Method and device for projecting relief images for direct viewing | |
| GB1087788A | Projecting 3-dimensional pictures for direct viewing | |
| US3240549A | Projecting 3-dimensional pictures for direct viewing | |
| US3285087A | Variable speed drive sprocket | |
| US3248164A | Motion picture film and projector |