| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 2 | |
| #3 | Germany | 1 | |
| #4 | France | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Furniture and games | |
| #3 | Measurement | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Filing and indexing | |
| #2 | Office furniture | |
| #3 | Radio navigation | |
| #4 | Goods for writing upon | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Neilsen Hildaur L | 7 |
| #2 | Neilsen H | 1 |
| #3 | Nielsen Hildaur L | 1 |
| #4 | Pollock Martin S | 1 |
| #5 | Neilsen Hildaur Lykke | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3817393A | Card holding device | |
| US3550980A | Combination of a rotary index and a support therefor | |
| US3279470A | Card index device | |
| US2748775A | Rotor for rotary card-filing devices | |
| US2796311A | Rotary-tray filing device | |
| US2761750A | Rotary card filing device and card backing means therein | |
| US2731017A | Rotary card filing device | |
| US2466736A | Inkwell | |
| CA889425A | Combination of a rotary index and a support therefor |