Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4719186 | Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm.sup.3 | Karl Mennemann, Georg Gliemeroth, Ludwig Ross, Burkhard Speit, Volkmar Geiler +1 more | 1988-01-12 |
| 4704371 | Infrared-transparent chalcogenide glass | Magdalena Winkler-Trudewig, Werner Schumann | 1987-11-03 |
| 4566987 | Scintillation glass | Georg Gliemeroth, Burkhard Speit | 1986-01-28 |
| 4562161 | Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm.sup.3 | Karl Mennemann, Georg Gliemeroth, Ludwig Ross, Burkhard Speit, Volkmar Geiler +1 more | 1985-12-31 |
| 4508834 | Spectacle glass with increased refractive index | Georg Gliemeroth, Ludwig Ross, Burkhard Speit, Volkmar Geiler, Lothar Meckel | 1985-04-02 |
| 4485178 | Phototropic glass with a brown tint in the irradiated state | Georg Gliemeroth, Uwe Eichhorn, Eva Holzel, Ludwig Ross, Burkhard Speit +2 more | 1984-11-27 |