Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9449475 | Emergency location device | — | 2016-09-20 |
| 5500029 | Filter element and method of manufacture | James F. Zievers, Elizabeth C. Zievers, Paul Eggerstedt | 1996-03-19 |
| 5328492 | Filtration apparatus | James F. Zievers, Paul Eggerstedt | 1994-07-12 |
| 5209844 | Hot gas filter with jet pulse cleaning | James F. Zievers, Elizabeth C. Zievers, Paul Eggerstedt | 1993-05-11 |