Cheng-Hwa Chuang

Follow

Person

Taipei, TW

People

Patents Grantslast 30 patents

Information Patent Grant
Cap for writing instrument
- Patent number D359510
- Issue date Jun 20, 1995
- Pioneer Industrial Corporation
- Cheng-Hwa Chuang
- D19 - Office supplies
Information Patent Grant
Combined refillable eraser tips and container therefor
- Patent number D355442
- Issue date Feb 14, 1995
- Pioneer Industrial Corporation
- Cheng-Hwa Chuang
- D19 - Office supplies
Information Patent Grant
Combined writing instrument and replaceable writing tips
- Patent number D341623
- Issue date Nov 23, 1993
- Pioneer Industrial Corporation
- Cheng-Hwa Chuang
- D19 - Office supplies