Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34055 | Vertically tiered particle filtering apparatus | — | 1992-09-08 |
| 4969937 | Vertically tiered particle filtering apparatus | — | 1990-11-13 |
| 4525184 | Vertically tiered particle filtering apparatus | — | 1985-06-25 |
| 4449159 | Focusing electrodes for high-intensity ionizer stage of electrostatic precipitator | James J. Schwab | 1984-05-15 |
| 4400971 | Method and means for measuring particulate matter on a filter | — | 1983-08-30 |