Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4396799 | Combination of a loudspeaking telephone set and a hand set for soft speaking | Klaas R. Franzen, Gijsbert Versteeg | 1983-08-02 |
CT
Cornelis M. A. Theunisse
Overall (All Time): #4,055,490 of 4,157,543Top 100%
1
Patents All Time