Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885473 | Method and apparatus for detecting particles in a fluid using a scanning beam | Arthur C. Miller, Jr., Gerhard Kreikebaum | 1989-12-05 |
| 4881957 | Air filtration units and methods employing dust as filtration media and air flow rate as a directly controlled parameter | — | 1989-11-21 |