Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5737435 | Sound-reproducing apparatus comprising an acoustic horn, and acoustic horn for use in the apparatus | Gerrit De Poortere, Guido Odilon Maurits D'Hoogh, Joris A. M. Nieuwendijk | 1998-04-07 |