Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Mark Chandler — 1 Patent in 2018

WHWeatherford Technology Holdings: 1 patents #102 of 254Top 45%
Houston, TX: #777 of 2,508 inventorsTop 35%
Texas: #5,205 of 15,368 inventorsTop 35%
Overall (2018): #323,856 of 503,207Top 65%
1 Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9957794 Dart detector for wellbore tubular cementation Burkhard Zippel, Martin Helms, Simon J. Harrall 2018-05-01