Details of hearing devices, i.e. of ear- or headphones covered by [CPC: H04R1/10] or [CPC: H04R5/033] but not provided for in any of their subgroups, or of hearing aids covered by [CPC: H04R25/00] but not provided for in any of its subgroups
Details of hearing devices, i.e. of ear- or headphones covered by [CPC: H04R1/10] or [CPC: H04R5/033] but not provided for in any of their subgroups, or of hearing aids covered by [CPC: H04R25/00] but not provided for in any of its subgroups