| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 6 | |
| #2 | EPO (European Patent Office) | 5 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Typewriters | |
| #2 | Permanently attaching objects | |
| #3 | Bookbinding | |
| #4 | Office accessories |
| # | Name | Total Patents |
|---|---|---|
| #1 | Raar Hans | 7 |
| #2 | Kelders Jan | 3 |
| #3 | Cramer Hendrik Christiaan | 1 |
| #4 | Van Swieten Roy Edwin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL9100721A | Ribbon cassette. | |
| NL8902801A | Cassette holder. | |
| NL8902096A | Holder for leaf-shaped objects. | |
| NL8900713A | Typewriter ink ribbon cassette - has integral part securing wheel bearing to allow movement | |
| US5005999A | Ink cassette with control means for alternately driving one of two spool bearing therein | |
| NL8900558A | Binding device. | |
| NL8702567A | Ink cassette and ink transfer roll for that. |