Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6465788 | Ruggedized photomultiplier tube and optical coupling in armored detector | — | 2002-10-15 |
| 6452163 | Armored detector having explosion proof enclosure | Larry D. Frederick | 2002-09-17 |
| 6435619 | Method for sensing coal-rock interface | Larry D. Frederick | 2002-08-20 |