US PATENT SUBCLASS 424 / 557
.~ Respiratory system (e.g., lung, etc.)

Current as of: June, 1999
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424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

520  DF  EXTRACT, BODY FLUID, OR CELLULAR MATERIAL OF UNDETERMINED CONSTITUTION DERIVED FROM ANIMAL IS ACTIVE INGREDIENT {21}
557.~ Respiratory system (e.g., lung, etc.)

DEFINITION

Classification: 424/557

Respiratory system (e.g., lung, etc.):

(under subclass 520) Subject matter in which the material is or is derived from part of the respiratory system.

(1) Note. Included in this subclass are lung, larynx, nasal cavity, paranasal sinuses, pleura and trachea.