|
US4535483A
|
Suture rings for heart valves |
Expired / Lapsed
|
1983-01-17 |
1985-08-20 |
24 |
Details
|
|
US4451937A
|
Heart valve having ear guided occluders |
Expired / Lapsed
|
1982-02-08 |
1984-06-05 |
27 |
Details
|
|
US4443894A
|
Heart valve with dog-leg pivot |
Expired / Lapsed
|
1982-04-12 |
1984-04-24 |
24 |
Details
|