Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6071481 | Zero grade air generating system | Loren T. Mathews, David R. Whineray | 2000-06-06 |
| 5753185 | Vehicle emissions testing system | Loren T. Mathews | 1998-05-19 |
| 5633170 | Method and apparatus for nitrogen oxide analysis | — | 1997-05-27 |
| 4990236 | Thin film moisture sensing element | Fred C. Sittler, Adrian C. Toy | 1991-02-05 |
| 4776942 | Electrochemical sensor | David H. Freund | 1988-10-11 |
| 4707244 | Solid state sensor element | John N. Harman, III | 1987-11-17 |
| 4655900 | Method for treating electrodes and improved electrochemical cell | John N. Harman, III | 1987-04-07 |
| 4575410 | Solid state electrode system for measuring pH | — | 1986-03-11 |
| 4485001 | Sterilizable pH electrode and method for producing the same | John N. Harman, III | 1984-11-27 |
| 4455213 | Pressure equalization system for membrane type amperometric sensors | Kenneth B. Sawa | 1984-06-19 |
| 4372915 | Fluorescent sulfur dioxide analyzer having an improved sulfur dioxide generator | Raymond E. Rocks | 1983-02-08 |
| 4328082 | Solid state ion-sensitive electrode and method of making said electrode | John N. Harman, III | 1982-05-04 |
| 4325912 | Carbon monoxide detection apparatus | Kenneth B. Sawa | 1982-04-20 |
| 4272248 | Nitric oxide interference free sulfur dioxide fluorescence analyzer | — | 1981-06-09 |
| 4268370 | High temperature, CO.sub.2 interference free, electrochemical O.sub.2 sensor | — | 1981-05-19 |