Wen-chang Yang

2 Patents

• US122691512025

  High-speed Nail Combined with an Inner-toothed Tube Having an Expandable Padding

  PREGUN INDUSTRIAL CO., Ltd.

  0 cites
• US122576822025

  High-speed Gunpowder Actuated Nail with a Toothed Tube

  PREGUN INDUSTRIAL CO., Ltd.

  0 cites