| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Materials and metallurgy | |
| #3 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Alloys | |
| #2 | Working metallic powder | |
| #3 | Magnets and transformers | |
| #4 | Capacitors and switching devices | |
| #5 | Reduction of greenhouse gas emissions | |
| #6 | Batteries |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hvidtfeldt N | 5 |
| #2 | Ruttkay A | 4 |
| #3 | Ruttkay Adam | 2 |
| #4 | Hvidtfeldt Niels | 2 |
| #5 | Brask Jensen J | 1 |
| #6 | Brask-Jensen J | 1 |
| #7 | Hwidtfeldt N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK337379A | Magnetic core for induction coils and procedures for its manufacturing | |
| DK169179A | Magnetic material and procedure for manufacturing magnetic substances of this material | |
| DE2811227A1 | Iron powder core for loudspeaker filters - prepd. by pressing powder which pref. includes lubricant and colloidal and phenolic resin binders |