Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236401 | Frequency response tester | Marguerite Johnson | 1980-12-02 |
| 4223397 | Turbulent flow device for testing hydrophones | Marguerite Johnson | 1980-09-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236401 | Frequency response tester | Marguerite Johnson | 1980-12-02 |
| 4223397 | Turbulent flow device for testing hydrophones | Marguerite Johnson | 1980-09-16 |