| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 5 | |
| #2 | Austria | 3 | |
| #3 | United Kingdom | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Processing photographic materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lienekampf Otto | 11 |
| #2 | Gustav Schmies Dr | 4 |
| #3 | Schmies Gustav Dr | 3 |
| #4 | Nauck Willy | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB190600235A | Improvements in Electrically Operated Photographic Copying Apparatus | |
| GB190526612A | Improvements in Photographic Printing or Copying Machines. | |
| US757323A | Photographic developing apparatus. |