Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911199 | Pilot operated safety valve | Sietse Bousema | 1990-03-27 |
| 4877356 | Method and apparatus for installing a flowline near the waterbottom | — | 1989-10-31 |
PB
Pieter J. Bontenbal
Shell Internationale Research Maatschappij B.V.: 1 patents #62 of 211Top 30%
Overall (All Time): #2,322,638 of 4,157,543Top 60%
2
Patents All Time