| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | United Kingdom | 2 | |
| #3 | France | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Processing photographic materials | |
| #3 | Optical systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Karl Leopold | 11 |
| #2 | Kneitz Heinz | 2 |
| #3 | Leopold Karl | 1 |
| #4 | Hupp Ludwig | 1 |
| #5 | Weis Helmar | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1267420A | Device for feeding film into film processing spirals | |
| GB962709A | Removable slide carrier for projectors | |
| FR1248675A | Box magazine for still image projector |