DC

David Chen

📍 Fremont, CA: #12 of 137 inventorsTop 9%
🗺 California: #676 of 10,592 inventorsTop 7%
Overall (1989): #29,687 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4871141 Adjustable umbrella support 1989-10-03
D300154 Combined toy guitar and microphone 1989-03-07