| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 12 | |
| #2 | Sweden | 5 | |
| #3 | Finland | 4 | |
| #4 | France | 4 | |
| #5 | Norway | 4 | |
| #6 | Australia | 3 | |
| #7 | Belgium | 3 | |
| #8 | Germany | 3 | |
| #9 | Italy | 3 | |
| #10 | United States | 3 | |
| #11 | Argentina | 2 | |
| #12 | Austria | 2 | |
| #13 | Canada | 2 | |
| #14 | Switzerland | 2 | |
| #15 | United Kingdom | 2 | |
| #16 | Greece | 2 | |
| #17 | Ireland | 2 | |
| #18 | Japan | 2 | |
| #19 | Netherlands | 2 | |
| #20 | Brazil | 1 | |
| #21 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Civil engineering | |
| #3 | Environmental technology | |
| #4 | Electrical machinery and energy | |
| #5 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keldmann Erik Christian Vilhel | 28 |
| #2 | Keldmann E C V | 11 |
| #3 | Keldmann Erik C V | 4 |
| #4 | Keldmann Erick C V | 1 |
| #5 | Adamsen K | 1 |
| #6 | Eritsuku Kurisuchiyan Buiruher | 1 |
| #7 | Adamsen Kaj | 1 |
| #8 | Eritsuku Kurisuteian Buiruheru | 1 |
| #9 | Keldmann Vilhelm Christian Eri | 1 |
| #10 | Kristiansen Jan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| BR8503676A | Ceiling or wall unit and ceiling or wall unit used in connection with a division | |
| IE851831L | Ceiling or wall unit provided with cooling pipes | |
| DK51684D0 | Air or wall construction | |
| DK54983D0 | Temperature Control System | |
| DE3139318A1 | Heating appliance | |
| DK410381A | Heater | |
| DK207479A | Temperature Control System | |
| US4216823A | Baseboard heating apparatus with cable carrier | |
| GB1593840A | Heating apparatus | |
| DK252977A | Heater | |
| DK89175A | Electrical heater | |
| DK583774A | Radiator | |
| DK395974A | Electrical heater | |
| DK147974A | Electrical radiator |