Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888988 | Silicon based mass airflow sensor and its fabrication method | Il Hyun Choi | 1989-12-26 |
| 4884443 | Control and detection circuitry for mass airflow sensors | Charles R. Cook Jr. | 1989-12-05 |
| 4870745 | Methods of making silicon-based sensors | — | 1989-10-03 |