DL

David B. Lorenz

MM Marathon Manufacturing: 2 patents #2 of 8Top 25%
Overall (All Time): #2,349,156 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4602894 Combination offshore drilling rig John Laird 1986-07-29
4455109 Barge hull for offshore drilling rigs — 1984-06-19