Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839872 | Geophone with a sensitive element made of piezoelectric polymer | Claude Gragnolati, Jean-Georges Malcor | 1989-06-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839872 | Geophone with a sensitive element made of piezoelectric polymer | Claude Gragnolati, Jean-Georges Malcor | 1989-06-13 |