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CPC Subgroup Additional Only
H04R 2207/021

Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges

Full Title

Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00 > Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges