|
US4412947A
|
Collagen sponge |
Expired / Lapsed
|
1982-05-26 |
1983-11-01 |
10 |
Details
|
|
US4374121A
|
Macromolecular biologically active collagen articles |
Expired / Lapsed
|
1980-09-24 |
1983-02-15 |
6 |
Details
|
|
US4295894A
|
Method of preparing soluble collagen fibers |
Expired / Lapsed
|
1979-11-19 |
1981-10-20 |
17 |
Details
|
|
US4279812A
|
Process for preparing macromolecular biologically active co… |
Expired / Lapsed
|
1979-09-12 |
1981-07-21 |
13 |
Details
|