| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 3 | |
| #2 | United States | 3 | |
| #3 | Austria | 2 | |
| #4 | Germany | 2 | |
| #5 | Netherlands | 2 | |
| #6 | Spain | 1 | |
| #7 | Finland | 1 | |
| #8 | Norway | 1 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Thermal processes | |
| #3 | Furniture and games | |
| #4 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Domestic stoves | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Chairs and beds | |
| #5 | Kitchen equipment | |
| #6 | Spectacles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kalkowski Kurt Ulrich | 6 |
| #2 | Kurt Ulrich Kalkowski | 2 |
| #3 | Kalkowski Kurt-Ulrich | 1 |
| #4 | Ulrich Kalkowski Kurt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2455693B1 | PROTECTIVE DEVICE MADE OF METAL FOIL FOR ELECTRIC COOKING PLATES | |
| DE2462229A1 | Cooking ring protection for electric cooker - cooking rings are covered with a thin aluminium sheet | |
| US3649075A | Protective device for upholstered furniture | |
| US3664733A | Antidazzle spectacles for motorists |