Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487282 | Apparatus and method for an inbound telemetry device to sense telephone line status | Yongping Xia | 2002-11-26 |
| 6347135 | Apparatus and method for powering a telephone-based inbound telemetry device | Yongping Xia | 2002-02-12 |