CD

Calvin Douglas

📍 Folsom, CA: #712 of 1,500 inventorsTop 50%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #1,996,781 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9227046 Intravenous line coupling apparatus — 2016-01-05
7484845 Headwear with keepers for eyeglasses — 2009-02-03