DH

Demetrius Calvin Ham

VD Vertical Doors: 1 patents #1 of 2Top 50%
📍 East Orange, NJ: #1 of 4 inventorsTop 25%
🗺 New Jersey: #1,952 of 6,350 inventorsTop 35%
Overall (2011): #317,382 of 364,097Top 90%
1
Patents 2011

Issued Patents 2011

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7941897 Vertical door conversion kit — 2011-05-17