GB2367436B
(en )
2004-02-04
Acoustic resonator
SG99374A1
(en )
2003-10-27
Acoustic resonator
GB2365250C
(en )
2005-04-04
Acoustic structures
TW462575U
(en )
2001-11-01
Improved structure of throat vibrating type microphone
TW471765U
(en )
2002-01-01
Throat vibrating type hands-free microphone structure
TW549780U
(en )
2003-08-21
Improved throat vibration type microphone
TW487266U
(en )
2002-05-11
Structure for the improvement of the timbre of a speaker
TW484783U
(en )
2002-04-21
Sound varying structure improvement of speaker
TW468920U
(en )
2001-12-11
Structure improvement of skin-touching type microphone
TW467462U
(en )
2001-12-01
Improved connecting structure of microphone head
TW486214U
(en )
2002-05-01
Sound head of microphone
TW465895U
(en )
2001-11-21
Improved structure of under-clamped earphone microphone
TW474535U
(en )
2002-01-21
Improved structure of sound box
TW465893U
(en )
2001-11-21
Improved vibration microphone
TW453600U
(en )
2001-09-01
Improved microphone head structure capable of enhancing sound receiving effect
TW458462U
(en )
2001-10-01
Improved microphone structure
TW465889U
(en )
2001-11-21
Improved structure of speaker box
TW504093U
(en )
2002-09-21
Improved structure of speaker sound box
TW486219U
(en )
2002-05-01
Sound speaker
TW511838U
(en )
2002-11-21
Improved structure of speaker
TW541944U
(en )
2003-07-11
Improved structure of ear stick
TW582685U
(en )
2004-04-01
Improved sound box structure
TW449220U
(en )
2001-08-01
Improved structure of throat-vibration type microphone
TW458466U
(en )
2001-10-01
Improved speaker structure
TW478704U
(en )
2002-03-01
Improved structure of speaker ring