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US6738489B2
(en)
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Vibration speaker
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KR102010926B1
(ko)
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패널 가진형 스피커
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FR2872671A1
(fr)
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Actionneur multifonction capable d'empecher la vibration
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US2209382A
(en)
|
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Telephone ringer
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TW201136332A
(en)
|
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Loudspeaker with magnetic element fixed on the drum membrane
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BE425739A
(OSRAM)
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|
|
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EP3956206A1
(en)
|
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Bicycle bell
|
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US2412610A
(en)
|
|
Audible signaling device
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|
US2251635A
(en)
|
|
Telephone signaling apparatus
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|
FR2778267A1
(fr)
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Bouton d'appel d'ascenseur pour non-voyants
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US4057688A
(en)
|
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Intercom embodying tap transducers
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US2270085A
(en)
|
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Chime signal
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US2649826A
(en)
|
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Electrically operated carillon
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US2385339A
(en)
|
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Signaling device
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US1852773A
(en)
|
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Electromagnetic signaling device
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US2548062A
(en)
|
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Bone conducting receiver with electromagnetic vibrator
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US854780A
(en)
|
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Combined annunciator and ringer for telephone-lines.
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|
BE675627A
(OSRAM)
|
|
|
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US436410A
(en)
|
|
Electro-magnetic bell |
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BE430526A
(OSRAM)
|
|
|
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KR102148292B1
(ko)
|
|
차량용 출몰형 스피커
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US3174121A
(en)
|
|
Electrical signal delay device
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US734453A
(en)
|
|
Telegraph-sounder.
|
|
JP3097343U
(ja)
|
|
携帯電話機の受信感知装置
|
|
US1815194A
(en)
|
|
Telephone receiver
|