Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830025 | Intrauterine contraceptive device | Raisa V. Gainutdinova, Bentsian M. Mazo, Vera M. Petrova | 1989-05-16 |
| 4807610 | Intrauterine contraceptive device | Raisa V. Gainutdinova, Bentsian M. Mazo, Vera M. Petrova | 1989-02-28 |