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BE361486A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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FR2490038A1
(fr)
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Reducteur de bruit notamment pour appareil d'enregistrement et de reproduction de signaux
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US1781550A
(en)
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Method of and apparatus for recording and reproducing sounds
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US1732874A
(en)
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Photographic sound recording
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BE381735A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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SU101A1
(ru)
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Приспособление дл записи звуковых влений на светочувствительной поверхности
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CH329797A
(fr)
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Procédé d'enregistrement de pistes sonores circulaires et dispositif pour la mise en oeuvre de ce procédé
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EP0692921B1
(fr)
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Dispositif de prise de son par microphone électret
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US1942066A
(en)
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Means and method for recording and reproducing photographic sound records
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BE361230A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE437647A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE541193A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE366028A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE364512A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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FR2579843A1
(fr)
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Amplificateur audio frequences avec compensation du bruit ambiant, principalement pour l'automobile
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BE421756A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE373450A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE390913A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE365213A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE471381A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE375271A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE365943A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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BE357806A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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FR2579842A1
(fr)
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Dispositif de compensation du bruit ambiant dans un amplificateur audio
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BE370638A
(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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