Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870972 | Multiple-frequency acoustic transducer, especially for medical imaging | Charles Maerfeld | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870972 | Multiple-frequency acoustic transducer, especially for medical imaging | Charles Maerfeld | 1989-10-03 |