DR

Douglas F. Royer

HA Hach: 4 patents #33 of 214Top 20%
📍 Gilbert, IA: #4 of 16 inventorsTop 25%
🗺 Iowa: #3,757 of 15,303 inventorsTop 25%
Overall (All Time): #1,130,993 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11719645 Reducing agent for arsenic measurement 2023-08-08
10006853 Vial and cap for turbidity standard Charles Johnson, Andreas Golitz, Bas de Heij 2018-06-26
8603410 Chromium-free indicating device 2013-12-10
8231841 Chromium-free indicating device for chloride detection 2012-07-31