C04B28/225 - CPC Classification Index

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Classification
C04B
C04B28/00
C04B28/18
C04B28/22
C04B28/225

ClassID:

88738 ⎘

C04B28/225 - CPC Classification

Classification description:

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Classification
C04B
C04B28/00
C04B28/18
C04B28/22
C04B28/225

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