Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6153098 | Spiral wound filter with central barrier | Douglas G. Bayerlein | 2000-11-28 |
| 4938869 | Spiral wound filter element | Douglas G. Bayerlein, William G. Nostrand | 1990-07-03 |