| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 | |
| #2 | United Kingdom | 6 | |
| #3 | Switzerland | 3 | |
| #4 | Belgium | 2 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Processing photographic materials | |
| #2 | Grinding or polishing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gerster Heinrich | 8 |
| #2 | Heinrich Gerster | 4 |
| #3 | Gerster Karlheinz | 1 |
| #4 | Karlheinz Gerster | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB968651A | Print drier | |
| GB917379A | Improvements in or relating to drying-drums of drying apparatus | |
| GB933487A | Improvements in or relating to drying machines for photographic prints | |
| GB393740A | Device for the production of high gloss photographs | |
| GB379922A | Drying device for papers, more particularly papers that are apt to crumple easily | |
| GB342892A | Improvements in apparatus for drying and imparting gloss to photographs |