Jiujian Liu

3 Patents

• US122676582025

  Multifunctional Sounding Device

  AAC Technologies (Nanjing) Co., Ltd.

  0 cites
• US122384742025

  Speaker Box

  AAC Technologies Pte. Ltd.

  0 cites
• US117655132023

  Dual Magnetic Circuits Structure and Sound Device

  AAC Microtech (Changzhou) Co., Ltd.

  0 cites