Ding-sian Cai

7 Patents

• US123878622025

  Electronic Lock

  TONG LUNG METAL INDUSTRY CO., Ltd.

  0 cites
• US123315492025

  Electronic Lock

  TONG LUNG METAL INDUSTRY CO., Ltd.

  0 cites
• US123240712025

  Electronic Lock

  TONG LUNG METAL INDUSTRY CO., Ltd.

  0 cites
• USD10635902025

  Smart Lock

  TONG LUNG METAL INDUSTRY CO., Ltd.

  0 cites
• US122346722025

  Bi-directional Electronic Lock Device and Method for Setting Up the Same When Mounted on a Door

  Tong Lung Metal Industry Co., Ltd.

  0 cites
• US121463412024

  Electronic Lock Device and Operation Method of the Same

  TONG LUNG METAL INDUSTRY CO., Ltd.

  0 cites
• US119148322024

  Membrane Touch Panel Device

  Tong Lung Metal Industry Co., Ltd.

  0 cites