Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904102 | Base plate for a loose-leaf holder | — | 1990-02-27 |
| 4832521 | Closure mechanism for a loose-leaf holder | — | 1989-05-23 |
| 4830528 | Closure mechanism for a loose-leaf holder | — | 1989-05-16 |
| 4531854 | Device for holding sheets provided with perforations | — | 1985-07-30 |
| 4434534 | Holding-down and clamping device for shackle mechanisms | — | 1984-03-06 |