Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4606057 | Arrangement for checking the counting function of counters | Johannes van Baardewijk, Johan E. A. Hartman | 1986-08-12 |
| 4545050 | Method of and arrangement for establishing a conference connection in a TDM communication system | Johannes van Baardewijk, Johan E. A. Hartman | 1985-10-01 |