HY

Haison Yuen

📍 Pingtung City, TW: #54 of 233 inventorsTop 25%
Overall (All Time): #1,664,090 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5002153 Ladder structure 1991-03-26
4947959 Folding ladder 1990-08-14
4842098 Adjustable folding ladder 1989-06-27