|
US4148664A
|
Preparation of fibrous collagen product having hemostatic a… |
Expired / Lapsed
|
1978-04-18 |
1979-04-10 |
5 |
Details
|
|
US3821371A
|
Pharmaceutical compositions containing microcrystalline col… |
Expired / Lapsed
|
1972-07-24 |
1974-06-28 |
7 |
Details
|
|
US3767437A
|
Phosthetic structures derived from collagen |
Expired / Lapsed
|
1971-10-20 |
1973-10-23 |
9 |
Details
|