DH

Demetrius Calvin Ham

VD Vertical Doors: 4 patents #1 of 2Top 50%
📍 East Orange, NJ: #7 of 75 inventorsTop 10%
🗺 New Jersey: #11,005 of 69,400 inventorsTop 20%
Overall (All Time): #650,445 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
8756763 Vertical door conversion kit 2014-06-24
8151417 Vertical door conversion kit 2012-04-10
7941897 Vertical door conversion kit 2011-05-17
7812500 Generator / electric motor 2010-10-12
7552514 Vertical door conversion kit 2009-06-30
7140075 Vertical door conversion kit with lag mechanism and motion range limiter 2006-11-28
7059655 Vertical door conversion kit 2006-06-13
6845547 Vertical door conversion kit 2005-01-25