DH

Douglass E. Hughes

UN Unknown: 1 patents #273 of 2,925Top 10%
📍 Boulder, CO: #59 of 423 inventorsTop 15%
🗺 Colorado: #352 of 3,015 inventorsTop 15%
Overall (2003): #69,623 of 273,478Top 30%
2
Patents 2003

Issued Patents 2003

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6523711 Automatic valved bottle cap for use with liquid containers Raymond G. Bryan 2003-02-25
6524477 Gravity-flow filtration cartridge for the removal of microorganisms and/or other contaminants 2003-02-25