DH

Derek J. Hengen

📍 Arcola, CA: #1 of 5 inventorsTop 20%
Overall (All Time): #1,151,162 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11033939 Method and apparatus for removing sludge deposits from oil storage tanks 2021-06-15
10900861 Pipeline element leak detection system and method 2021-01-26
10569314 Method and apparatus for removing sludge deposits from oil storage tanks 2020-02-25
10260986 Pipeline element leak detection system and method 2019-04-16