SONION TECH A/S

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7110560 Electret condensor microphone preamplifier that is insensitive to leakage currents at the inputExpiredMar 08, 02Sep 19, 06[H04R]
2004/0156,520 Miniature digital transducer with reduced number of external terminalsAbandonedApr 10, 03Aug 12, 04[H04R]
2003/0223,592 Microphone assembly with auxiliary analog inputAbandonedApr 10, 03Dec 04, 03[H04R, H02B]

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