Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4642129 | Method for manufacturing preforms of glass for optical fibers | Josef Grabmaier | 1987-02-10 |
| 4537611 | Method for manufacturing glass from the gas phase | Josef Grabmaier | 1985-08-27 |
| 4501492 | Method for testing specimens | — | 1985-02-26 |
| 4311726 | Method for the manufacture of a high-tensile strength optical waveguide | Heinz Hacker, Hubert Aulich, Josef Grabmaier | 1982-01-19 |
| 4213672 | Light waveguide with a high tensile strength | Hubert Aulich, Heinz Hacker, Guenter Zeidler | 1980-07-22 |