DC

David D. Calhoun

📍 Duxbury, MA: #7 of 24 inventorsTop 30%
🗺 Massachusetts: #4,639 of 13,863 inventorsTop 35%
Overall (2022): #486,376 of 548,613Top 90%
1
Patents 2022

Issued Patents 2022

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11390545 Zero discharge water treatment apparatus and method Mark D. Lorusso, R. Edward Rose, Jr. 2022-07-19