Assignee
PICA SOUND INTERNAT
US·3 granted patents·1 citations·filing 1999–2002
Top patents by PatentIndex Score
3 records- 0135US6777603B2Perforated open volume acoustic resonatorPICA SOUND INTERNAT·Filed 2002·Granted Aug 17, 2004·0 cites·18 claims
- 0220US6944306B1Harmonic amplifier and corresponding electro-acoustic transducerPICA SOUND INTERNAT·Filed 1999·Granted Sep 13, 2005·1 cites·13 claims
- 0320US6627805B1Audio device and method including a membrane having at least two tongues with different resonant frequenciesPICA SOUND INTERNAT·Filed 1999·Granted Sep 30, 2003·0 cites·18 claims
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