9 Telegraph switch relay machine, also known as a repeater; voice frequency transmission apparatus, namely tapeless voice recorder; portable communication apparatus, namely cellular phone and pager; sound transmitting apparatus, namely a sound amplifier; microprocessors; transmitters of electronic signals, namely modem, local area network (LAN) card, integrated services packet network public address (ISPN PA) system circuit board, and local area network HUB; electronic circuit-aided learning instruments, namely voice identification apparatus; adapters for use on telephone sets, namely an electrical power adapter and a telephone ear-piece and mouth-piece adapter; telephone sets comprised of caller identification box; cordless telephone sets comprised of a microphone, a speaker, an audio jack and a telephone line connection jack; telephone sets comprised of autodialer; telephone sets comprised of extension board, namely a keypad having a plurality of keys which include an ON-OFF hook key and a redial key
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