DH

Daniel Hartwell

🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%
Overall (All Time): #1,802,264 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11610512 Expiratory breathing simulator device and method Michael Bernard Arthur Sheedy 2023-03-21
7048162 Hands-free forearm carrier of articles Rebecca Frye 2006-05-23