Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866185 | Difunctional polyfluoroaromatic derivatives and a process of preparing the same | John F. Stephen | 1989-09-12 |
| 4842915 | Tufting base for carpets made of a spunbonded fabric, a method of manufacturing the base, and a tufting carpet | Engelbert Loecher, Ivo Ruzek, Norbert Weber | 1989-06-27 |