Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5152815 | Type 114 tiered filter | James F. Zievers, Paul Eggerstedt | 1992-10-06 |
| 5037461 | Filtration apparatus | James F. Zievers, Paul Eggerstedt | 1991-08-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5152815 | Type 114 tiered filter | James F. Zievers, Paul Eggerstedt | 1992-10-06 |
| 5037461 | Filtration apparatus | James F. Zievers, Paul Eggerstedt | 1991-08-06 |