Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10721566 | Receiver assembly comprising an armature and a diaphragm | Mattijs Tjepkema, Jan Hijman, Gerardus Johannes Franciscus Theodorus van der Beek, Camiel Eugène Groffen, Tomasz Kaszuba +1 more | 2020-07-21 |
| 10708685 | Receiver with venting opening | Jan Hijman, Gerardus Johannes Franciscus Theodorus van der Beek, Camiel Eugène Groffen, Tomasz Kaszuba, Grzegorz Kurpiel | 2020-07-07 |