Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9069134 | Method for producing an optical splitter cascade and optical assembly | Stefan Kufner, Maria Kufner, Wolfgang Foss, Marco Bock, Frank Baetz | 2015-06-30 |
| 6305454 | Venetian type blind having pivot slat and tilting slat | Ren Judkins | 2001-10-23 |
| 6253823 | Headrail for cut down venetian type blinds | Cletis F. Swopes, Ren Judkins | 2001-07-03 |
| 5114453 | Lightwave guide produced by ion exchange of cs+ ions | Werner Schumann | 1992-05-19 |
| 5004707 | Lightwave guide produced from special substrate glasses by ion exchange against CS.sup.+ ions | Werener Schumann | 1991-04-02 |
| 4824809 | Optical CdO and ThO.sub.2 -free glass with refractive indices of 1.73-1.78 abbe numbers of 30-34, and high devitrification stability | Danuta Grabowski | 1989-04-25 |
| 4814299 | Optical glass with refractive index 1.60, an abbe number 58, with high chemical stability and resistance to phase separation and crystallization | Volkmar Geiler | 1989-03-21 |
| 4734389 | Highly refractive optical glass with refractive indices >1.83 and Abbe numbers <25, and with very good chemical stability | Danuta Grabowski, Volkmar Geiler | 1988-03-29 |
| 4721690 | High PbO-content glasses in the system SiO.sub.2 --PbO--M.sub.2 O with increased chemical stability | Danuta Grabowski, Burkhard Speit, Volkmar Geiler | 1988-01-26 |
| 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, Burkhard Speit, Volkmar Geiler, Hans-Georg Krolla +1 more | 1988-01-12 |
| 4686196 | Phototropic glass with a refractive index greater than or equal to 1.59, an abbe number greater than or equal to 44 and a density less than or equal to 3.0 g/cm.sup.3 | Georg Gliemeroth, Uwe Eichhorn, Eva Hoelzel, Burkhard Speit | 1987-08-11 |
| 4584279 | Optical glass with refractive indices>1.90, Abbe numbers>25 and high chemical stability | Danuta Grabowski, Volkmar Geiler, Karl Mennemann, Georg Gliemeroth | 1986-04-22 |
| 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, Burkhard Speit, Volkmar Geiler, Hans-Georg Krolla +1 more | 1985-12-31 |
| 4526874 | Optical light weight glass with a refractive index of >1.70, an Abbe index of >22 and a density of <3.5 G/CM.sup.3 | Danuta Grabowski geb. Marszalek, Volkmar Geiler, Karl Mennemann | 1985-07-02 |
| 4508834 | Spectacle glass with increased refractive index | Georg Gliemeroth, Burkhard Speit, Volkmar Geiler, Hans-Georg Krolla, Lothar Meckel | 1985-04-02 |
| 4485178 | Phototropic glass with a brown tint in the irradiated state | Georg Gliemeroth, Uwe Eichhorn, Eva Holzel, Hans-Georg Krolla, Burkhard Speit +2 more | 1984-11-27 |