Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871311 | Improvements in a method of and a retraction cord for uncovering and draining the preparation limit line of teeth | — | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871311 | Improvements in a method of and a retraction cord for uncovering and draining the preparation limit line of teeth | — | 1989-10-03 |