Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679093 | Method of calibration using analytical apparatus for measurement of low concentration constituent | John E. Johnson | 2004-01-20 |
| 6526811 | Analytical apparatus for measurement of low concentration constituent, method of measurement and calibration using the same | John E. Johnson | 2003-03-04 |
| 4727886 | Inhalation detection apparatus | John Conrardy, Bruce J. Fiorani, Robert H. Pedersen | 1988-03-01 |