| 424 / | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
| 400 | DF | PREPARATIONS CHARACTERIZED BY SPECIAL PHYSICAL FORM {12} |
| 422 | DF | .~ Implant or insert {5} |
| 427 | ![]() | .~.~ Ocular {2} |
| 428 | DF | .~.~.~> Bioerrodable, resorbable, or dissolving |
| 429 | DF | .~.~.~> Contact lens |