DH

Douglas A Hartwell

UM University Of Massachusetts: 1 patents #755 of 1,810Top 45%
📍 Vergennes, VT: #46 of 133 inventorsTop 35%
🗺 Vermont: #2,192 of 4,968 inventorsTop 45%
Overall (All Time): #2,004,287 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9314111 Convertible child carrier James H Sadler 2016-04-19
5964380 Viscous liquid applicator Ruth V. Hazzard, Ellen D. Siedlecki, Brian B. Schultz 1999-10-12