Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859222 | Method for the manufacture of a light wave guide | Hartmut Bauch, Peter Krause, Ulrike Jost, Volker Paquet, Wolfgang Siefert | 1989-08-22 |
| 4851025 | Process for producing a planar optical waveguide | Wolfgang Siefert | 1989-07-25 |