Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821004 | Method for the elimination of spurious echos in electro-acoustic delay lines using bulk waves and delay line applying this method | Philippe Defranould | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821004 | Method for the elimination of spurious echos in electro-acoustic delay lines using bulk waves and delay line applying this method | Philippe Defranould | 1989-04-11 |