| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United Kingdom | 1 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Processing photographic materials | |
| #3 | Measuring light |
| # | Name | Total Patents |
|---|---|---|
| #1 | Homrich Ferdinand | 5 |
| #2 | Ferdinand Homrich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2208725A | Photographic reproducing apparatus | |
| GB481701A | Improvements in photographic contact printing devices | |
| DE484309C | Drying device for wet papers, especially photos or the like. | |
| DE472644C | Drying device for wet papers, especially photos, blueprints or the like. | |
| DE491957C | Drying cabinet for photographic purposes | |
| DE471214C | Drying cabinet for photographic films and plates |