Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5127929 | Process for the manufacturing of optical waveguides with fusion of a sleeving tube onto a mother preform | Ulrich Siemers, Manfred Wittmann | 1992-07-07 |
| 5113035 | Device for the production of an optical waveguide preform | Manfred Wittmann | 1992-05-12 |