| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Switzerland | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Austria | 1 | |
| #5 | Canada | 1 | |
| #6 | Denmark | 1 | |
| #7 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Filing and indexing | |
| #2 | Books |
| # | Name | Total Patents |
|---|---|---|
| #1 | Jan Pilkes | 2 |
| #2 | Pilkes Jan | 2 |
| #3 | Lentz Jacobus Lambertus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB751712A | Suspension members for hanging files, cards, zig-zag files or the like | |
| DE753018C | Tab for maps, folders or the like. | |
| GB519971A | Improvements relating to indicating tabs for card indexes, filing systems and the like | |
| DE702886C | . of card indexes | |
| DE626921C | Book with columns and sliding strips that carry the headings | |
| CA466842A | Tabs (riders) for cards, files, systems with detachable sheets and the like |