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2020
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Invention
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A grand piano soundboard with a bar and sound tunnels.
A grand piano soundboard with a bar and s... |
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Invention
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A full-frequency band high quality mems microphone with a bar and sound tunnels.
A full-frequenc... |
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Invention
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Full-band mems microphone having sound beams and sound tunnels. A full-band MEMS microphone havin... |
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Invention
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Sound board with sound beams and sound tunnels in grand piano. Disclosed is a sound board (1) wit... |
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Invention
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Full-band high-quality dulcimer provided with sound beams and sound tunnels. A full-band high-qua... |
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Invention
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360-degree omnidirectional full frequency loudspeaker and vibrating diaphragm thereof. A 360-degr... |
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Invention
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Full-band high-sound-quality thin speaker having sound beam and sound tunnels. A full-band high-s... |
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Invention
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Full-band high-sound-quality hearing aid having sound beams and sound tunnels. A full-band high-s... |
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Invention
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Sound board having sound beams and sound tunnels in upright piano. A sound board (1) having sound... |
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Invention
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Full-frequency band high quality speaker with a bar and sound tunnels. A full-frequency band high... |
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Invention
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A full-frequency band high quality planar resonance speaker with a bar and sound tunnels.
A full... |
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Invention
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A kind of double-bars violin family without sound post.
A double-bar violin family without sound... |
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Invention
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A full-frequency band high quality electronic products speaker with a bar and sound tunnels.
A f... |
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Invention
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Full-band high-quality loudspeaker having sound beam and sound tunnel. A full-band high-quality l... |
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Invention
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Full-frequency-band high-sound-quality electronic product speaker having brace and channels. A fu... |
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Invention
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Full frequency band high sound quality planar resonant loudspeaker provided with sound beam and s... |
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Invention
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Full-band high-quality bowl-shaped loudspeaker having beam and channels. A full-band high-quality... |
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Invention
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Sound-post-free double-bracing violin. Disclosed is a sound-post-free double-bracing violin, comp... |
