Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370004 | Multiple port personal air sampling apparatus | Daniel E. Bruce, Charles H. Etheridge | 1994-12-06 |
| 5295790 | Flow-controlled sampling pump apparatus | Charles H. Etheridge, Craig D. Gestler | 1994-03-22 |