Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5652575 | Maintenance termination unit for telephone circuits | Michael Challis | 1997-07-29 |
| 5604785 | Remotely actuated switch and protection circuit | Michael Challis | 1997-02-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5652575 | Maintenance termination unit for telephone circuits | Michael Challis | 1997-07-29 |
| 5604785 | Remotely actuated switch and protection circuit | Michael Challis | 1997-02-18 |