DB

Daniel S. Belczewski

📍 Calgary, CA: #1,801 of 5,407 inventorsTop 35%
Overall (All Time): #2,178,748 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6874577 Water, oil and gas well recovery system Douglas H. Abbott 2005-04-05
6644399 Water, oil and gas well recovery system Douglas H. Abbott 2003-11-11