Estec Corporation

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS 2105

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7570774 Speaker having improved sound-radiating function to both directionsMay 16, 05Aug 04, 09[H04R]
6611605 Speaker having a device capable of generating sound and vibrationDec 04, 00Aug 26, 03[H04R]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0232,634 SPEAKER WITH SOUND GENERATION PART OF LARGE AREAAbandonedNov 01, 07Sep 25, 08[H04R]
2004/0179,711 Speaker having a weight ringAbandonedMar 09, 04Sep 16, 04[H04R]
6039146 Method of manufacturing speaker diaphragmExpiredNov 06, 98Mar 21, 00[H04R]

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