Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5053343 | Selective ionization of gas constituents using electrolytic reactions | Donald N. Campbell, Robert C. Davis, Glenn E. Spangler, Julio A. Reategui | 1991-10-01 |
| 4839143 | Selective ionization of gas constituents using electrolytic reactions | Donald N. Campbell, Robert C. Davis, Glenn E. Spangler, Julio A. Reategui | 1989-06-13 |
| 4712008 | Ion mobility spectrometer | John P. Carrico, Sr., Glenn E. Spangler, Donald N. Campbell, Charles E. Martin | 1987-12-08 |
| 4597299 | Ion gate sample gas inlet control for gas chromatograph analyzer | Donald N. Campbell, Robert C. Davis | 1986-07-01 |