DP

Donald L. Purvis

BS Bj Services: 1 patents #5 of 26Top 20%
📍 Parker, CO: #8 of 26 inventorsTop 35%
🗺 Colorado: #746 of 2,977 inventorsTop 30%
Overall (2002): #227,325 of 266,432Top 90%
1
Patents 2002

Issued Patents 2002

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6367548 Diversion treatment method David Cramer, David D. Smith, Douglas L. Walton 2002-04-09