Inventor
REN ZHANG
CN45 patents
⚠️ This page may combine multiple inventors who share the name “REN ZHANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AAC MICROTECH CHANGZHOU CO LTD
42 patentsUS12317047B2May 27, 2025
Vibration sounding device
AAC MICROTECH CHANGZHOU CO LTD2 citations75
US12155991B2Nov 26, 2024
Electronic device with a function of sound
AAC MICROTECH CHANGZHOU CO LTD3 citations75
US12052540B2Jul 30, 2024
Speaker box
AAC MICROTECH CHANGZHOU CO LTD4 citations75
US12120495B2Oct 15, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD5 citations74
US12047733B1Jul 23, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD3 citations74
US12156007B2Nov 26, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD2 citations73
US12156008B2Nov 26, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD1 citations62
US11758321B2Sep 12, 2023
Speaker box
AAC MICROTECH CHANGZHOU CO LTD1 citations62
US11665471B1May 30, 2023
Sounding device
AAC MICROTECH CHANGZHOU CO LTD0 citations62
US11665480B2May 30, 2023
Speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations62
US12587789B2Mar 24, 2026
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12587791B2Mar 24, 2026
Sound-generating device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12532121B2Jan 20, 2026
Speaker device and stylus
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12532122B2Jan 20, 2026
Speaker device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12513464B2Dec 30, 2025
Single power amplifier circuit realizes high and low frequency division of a speaker and anti-phase muffling of a receiver, and sounding device incorporating same
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12483823B2Nov 25, 2025
Sound-generating device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12477268B2Nov 18, 2025
Speaker device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12452597B2Oct 21, 2025
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12452581B2Oct 21, 2025
Earphone core and earphone
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12407975B2Sep 2, 2025
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12407986B2Sep 2, 2025
Sounding device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12407976B2Sep 2, 2025
Coaxial earphone core
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12407987B2Sep 2, 2025
Speaker device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12401939B2Aug 26, 2025
Coaxial speaker box
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12395795B2Aug 19, 2025
Sound device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12389161B2Aug 12, 2025
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12317048B2May 27, 2025
Sounding device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12289572B2Apr 29, 2025
Electronic device with a sounding function
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12289591B2Apr 29, 2025
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12289590B2Apr 29, 2025
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12160720B2Dec 3, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12160721B2Dec 3, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12160719B2Dec 3, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12155992B2Nov 26, 2024
Coaxial speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12088994B2Sep 10, 2024
Speaker box
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US11765512B2Sep 19, 2023
Acoustic device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US11665481B2May 30, 2023
Speaker device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US11659334B2May 23, 2023
Acoustic device
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US11622201B2Apr 4, 2023
Speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations52
US12413910B2Sep 9, 2025
Speaker device
AAC MICROTECH CHANGZHOU CO LTD0 citations51
US11671762B2Jun 6, 2023
Speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations51
US12506963B2Dec 23, 2025
Anti-shake mechanism and camera module
AAC MICROTECH CHANGZHOU CO LTD0 citations47