Inventor
LIU KEJIA
CN16 patents
⚠️ This page may combine multiple inventors who share the name “LIU KEJIA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AAC MICROTECH CHANGZHOU CO LTD
6 patentsUS11641151B2May 2, 2023
Linear vibration motor with elastic members with brackets, foams and damping glue
AAC MICROTECH CHANGZHOU CO LTD5 citations74
US11750074B2Sep 5, 2023
Linear vibration motor with elastic member and flexible PCB fixed on a fixing member via positioning holes
AAC MICROTECH CHANGZHOU CO LTD0 citations62
US11943596B2Mar 26, 2024
Acoustic device
AAC MICROTECH CHANGZHOU CO LTD1 citations61
US11697133B2Jul 11, 2023
Linear motor
AAC MICROTECH CHANGZHOU CO LTD0 citations51
US12003938B2Jun 4, 2024
Speaker
AAC MICROTECH CHANGZHOU CO LTD0 citations50
US11950071B2Apr 2, 2024
Acoustic device
AAC MICROTECH CHANGZHOU CO LTD0 citations50
AAC TECH NANJING CO LTD
3 patentsUS12452592B2Oct 21, 2025
Coaxial speaker protection method, coaxial speaker protection system, coaxial speaker protection device, and coaxial speaker protector
AAC TECH NANJING CO LTD0 citations57
US12563341B2Feb 24, 2026
Transducer protection system and method
AAC TECH NANJING CO LTD0 citations46
US12477274B2Nov 18, 2025
Coaxial speaker protection method, coaxial speaker protection system, coaxial speaker protection device, and coaxial speaker protector
AAC TECH NANJING CO LTD0 citations46