Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DH

David A. Howell — 1 Patent in 2016

ExxonMobil: 1 patents #328 of 854Top 40%
Houston, TX: #704 of 2,278 inventorsTop 35%
Texas: #5,076 of 14,752 inventorsTop 35%
Overall (2016): #426,818 of 481,213Top 90%
1 Patents 2016

Issued Patents 2016

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9303485 Wellbore apparatus and methods for zonal isolations and flow control Michael T. Hecker, Michael D. Barry, Petrus A. J. Stevens, Charles S. Yeh, Iain MacLeod +3 more 2016-04-05