Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4414253 | Method for applying liquid plasticizer to filamentary filter material | Peter Grumer, Wolfgang Wiese | 1983-11-08 |
| 4368688 | Apparatus for applying liquid plasticizer to filamentary filter material | Peter Grumer, Wolfgang Wiese | 1983-01-18 |