Issued Patents 2016
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9528337 | Up-hole bushing and core barrel head assembly comprising same | — | 2016-12-27 |
| 9399898 | Core drilling tools with retractably lockable driven latch mechanisms | Charles Ernest Muntz, Christopher L. Drenth | 2016-07-26 |
| 9328608 | Driven latch mechanism | Christopher L. Drenth, George Ibrahim | 2016-05-03 |
| 9234398 | Core drilling tools with retractably lockable driven latch mechanisms | Christopher L. Drenth, George Ibrahim | 2016-01-12 |