Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621782 | Test interface adapter emulating on test trunk interface for non-standard central office switch | Derek G. Foster | 1997-04-15 |
| 5617466 | Mechanism for controllably enabling test set to assert off-hook condition on telephone line in dependence upon detection of prescribed voltage level and absence of data traffic | — | 1997-04-01 |