Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5174784 | Electrical connection member for connecting a wire-shaped electrical conductor | — | 1992-12-29 |
| 4948376 | Connector | — | 1990-08-14 |
| 4920297 | Electric lamp | Johannes M. A. van der Heijden, Pierre L. L. M. Derks | 1990-04-24 |
| 4277654 | Stethoscopic headphone set | — | 1981-07-07 |