Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820507 | Oral and dental hygiene preparations | Hans-Juergen Klueppel, Horst Rutzen, Rudolf Lehmann | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820507 | Oral and dental hygiene preparations | Hans-Juergen Klueppel, Horst Rutzen, Rudolf Lehmann | 1989-04-11 |