| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 2 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Denmark | 1 | |
| #6 | Finland | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Surface technology and coating | |
| #2 | Optics | |
| #3 | Textiles and paper |
| # | Name | Total Patents |
|---|---|---|
| #1 | Eugen Blandhoel Bjarne | 2 |
| #2 | Knut Mauritz Iversen | 1 |
| #3 | Bjarne Eugen Blandhoel | 1 |
| #4 | Mauritz Iversen Knut | 1 |
| #5 | Iversen Knut Mauritz | 1 |
| #6 | Cliche A S | 1 |
| #7 | Iversen Knut M | 1 |
| #8 | Blandhoel Bjarne Eugen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2789491A | Apparatus for deep-etching, preferably of printing plates | |
| GB721873A | Process for deep-etching of metal photo-mechanical printing plates |