| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 2 | |
| #2 | France | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Italy | 2 | |
| #5 | Netherlands | 2 | |
| #6 | Belgium | 1 | |
| #7 | Switzerland | 1 | |
| #8 | Germany | 1 | |
| #9 | Luxembourg | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Textiles and paper | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Unspecified technologies | |
| #3 | Making paper goods |
| # | Name | Total Patents |
|---|---|---|
| #1 | Holzknecht Walter | 3 |
| #2 | Holzknecht Walter Johann | 2 |
| #3 | Holzknecht W J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2841515B1 | Process for the production of a number of signs | |
| CH608120A5 | Information medium |