Eastern Technologies Holding Limited
Patent Applications and Registrations
Patent applications and USPTO patent grants for Eastern Technologies Holding Limited.The latest application filed is for "treble and bass headphone structure".
- Eastern Technologies Holding Limited - Grand Cayman N/A KY
- Eastern Technologies Holding Limited - Cayman Islands KY
- Eastern Technologies Holding Limited -
| Patent | Date |
|---|---|
| Treble and bass headphone structure Grant 9,124,976 - Chu , et al. September 1, 2 | 2015-09-01 |
| Treble And Bass Headphone Structure App 20150208160 - CHU; Ming-Chung ; et al. | 2015-07-23 |
| Earphone with tension diaphragm Grant 8,744,111 - Chu June 3, 2 | 2014-06-03 |
| Negative pressure earphone Grant 8,737,665 - Chung , et al. May 27, 2 | 2014-05-27 |
| Simulated Sound Field Earphone App 20140072153 - Chung; Chu Ming ; et al. | 2014-03-13 |
| Earphone With Tension Diaphragm App 20140064548 - CHU; Ming-Chung | 2014-03-06 |
| Reverse-direction co-axial earphone Grant 8,588,453 - Lee November 19, 2 | 2013-11-19 |
| Negative pressure earphone App 20130259286 - Chung; Chu Ming ; et al. | 2013-10-03 |
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