Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6429928 | Method and apparatus employing external light source for endpoint detection | David Johnson, Todd Nielsen, Robert James Hatfield | 2002-08-06 |
| 6369887 | Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light | Mark Eyolfson, Elton J. Hochhalter, David Johnson, Peter S. Frank | 2002-04-09 |