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INDEPENDANTE DE T S F SOC
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INDEPENDANTE DE T S F SOC
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H03J3/24—Continuous tuning of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning
FR621765D1926-07-271926-07-27Dispositif récepteur réduit pour télégraphie et téléphonie sans fil, permettant simultanément plusieurs usages
ExpiredFR621765A
(fr)