Sheng-fan Chang

5 Patents

• US123745112025

  Keycap

  Primax Electronics Ltd.

  0 cites
• US123621102025

  Keycap

  Primax Electronics Ltd.

  0 cites
• US122116572025

  Keycap

  Primax Electronics Ltd.

  0 cites
• US116262592023

  Membrane Circuit Structure

  PRIMAX ELECTRONICS Ltd.

  0 cites
• US116107452023

  Key Structure

  PRIMAX ELECTRONICS Ltd.

  0 cites