Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884021 | Digital power metering | Ronald L. Kirk, Eric R. Francis | 1989-11-28 |
| 4868893 | System for remote, interactive communication with a metal under ambient sunlight conditions | — | 1989-09-19 |