Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4241796 | Active drill stabilizer assembly | Sidney J. Green, Carl J. H. B. Van Kempen | 1980-12-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4241796 | Active drill stabilizer assembly | Sidney J. Green, Carl J. H. B. Van Kempen | 1980-12-30 |