| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 8 | |
| #2 | Germany | 7 | |
| #3 | United Kingdom | 5 | |
| #4 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Basic materials chemistry | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Photosensitive materials | |
| #2 | Photomechanical semiconductor production | |
| #3 | Unspecified technologies | |
| #4 | Matches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Christensen Jens Herman | 8 |
| #2 | Jens Herman Christensen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB644970A | Improvements in and relating to sensitive photographic emulsions | |
| GB632543A | Improvements in and relating to sensitive photographic emulsions | |
| GB289175A | Improvements in the production of coloured photographic pictures | |
| GB163311A | Improvements in or relating to multicolour screens for photography | |
| GB160739A | Improvements in or relating to photographic reproduction by means of a phosphorescent medium | |
| AU312705B | Improvements in and relating to relays for telephones telegraphones andthe like |