| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 3 | |
| #2 | Belgium | 1 | |
| #3 | Switzerland | 1 | |
| #4 | Germany | 1 | |
| #5 | Spain | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Italy | 1 | |
| #9 | Netherlands | 1 | |
| #10 | Norway | 1 | |
| #11 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | General building constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keldmann Erik | 10 |
| #2 | Rindel Jens Holger | 8 |
| #3 | Weischelfeldt Flemming | 1 |
| #4 | Alstrup Poul | 1 |
| #5 | Rindel J H | 1 |
| #6 | Lillelund Stig | 1 |
| #7 | Keldmann E | 1 |
| #8 | Koch Mikael | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK240987D0 | Procedure for preparing a sound absorbent | |
| DK241087D0 | Sound ments for ventilation and air conditions | |
| DK586986D0 | Raerisolering |