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KR0124182B1
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Overlapping telephone using brenched telephone
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KR0124186B1
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Full electronic switching system
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KR0121960B1
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Ring signal detecting method
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KR0121961B1
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Driving method of answering machine
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KR0124181B1
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Telephone number storge deivce
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KR970003978B1
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Method for connecting the fixed station in the portable terminal
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KR0130417B1
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Method for testing processor in the full electronic switching system
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KR970003977B1
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Method for controlling ehe channel signal transfer in the fixed station
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KR0124185B1
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Global bus in electronic exchange
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KR0130416B1
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Apparatus for testing space division switch of exchange
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KR0123106B1
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Method for accessing the time slot
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KR970011410B1
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Phone number storage
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KR970011416B1
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Ring level control
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KR0121964B1
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Method for evesdropping voice of a cellular phone
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KR970010249B1
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Dual control apparatus
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KR0123105B1
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Method for connecting cellular phone
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KR970008508B1
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Assembly for computer body
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KR970011417B1
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Phone control system
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KR970003976B1
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Method for controlling input/output state display of the cellular phone
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KR970010251B1
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Matrix switching apparatus for time switch interface
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