DIFF Subgroup Additional Only
Y10T 428/249962 Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
Full Title
Stock material or miscellaneous articles > Web or sheet containing structurally defined element or component > Composite having voids in a component [e.g., porous, cellular, etc.] > Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.