DY

David Yang

SS S. M. W. Seiko: 1 patents #1 of 2Top 50%
📍 Pudong New District, PA: #1 of 1 inventorsTop 100%
Overall (1994): #143,247 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5368415 Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus Ikuo Kono 1994-11-29