Jianhua Ding

2 Patents

• US122384672025

  Speaker Box

  AAC TECHNOLOGIES (NANNING) CO., Ltd.

  0 cites
• US121295262024

  Gradient Steel Material Having Surface Layer with Ferrite and Inner Layer with Ferrite + Pearlite and Manufacturing Method

  BAOSHAN IRON & STEEL CO., Ltd.

  0 cites