9 ELECTRICAL, ELECTRONIC, ELECTRO-OPTICAL AND ELECTROMECHANICAL SIGNALING OR WARNING APPARATUS; NAMELY, TELEPHONE AND TELECOMMUNICATIONS APPARATUS, DOOR CHIMES, DOOR BELLS, SIGNAL BELLS, ALARM BELLS, ELECTRONIC SOUND GENERATING DEVICES, SIRENS, BUZZERS, SWITCHES, PUSH BUTTONS, ELECTRIC WARNING LIGHTS, TRANSFORMERS, SOLAR CELLS, BATTERIES, PRINTED CIRCUIT BOARDS, WIRES AND FUSES; ELECTRICAL AND ELECTRONIC APPARATUS FOR PROTECTION AGAINST MECHANICAL, ELECTRICAL OR ELECTROMAGNETIC INTERFERENCE