Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867842 | Method of making slotted diaphragm semiconductor devices | Robert G. Johnson | 1989-09-19 |
| 4829818 | Flow sensor housing | — | 1989-05-16 |
| 4825693 | Slotted diaphragm semiconductor device | Robert G. Johnson | 1989-05-02 |