Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10327630 | Method and system for determining the subjective refraction properties of an eye | Arne Ohlendorf, Siegfried Wahl | 2019-06-25 |
| 9717407 | Apparatus and method for testing night vision | Timo Kratzer | 2017-08-01 |
| 9259145 | Apparatus and method for testing night vision | Timo Kratzer | 2016-02-16 |
| 8827451 | Eyesight testing device | Michael Gamperling, Matthias Kubitza | 2014-09-09 |
| 8038296 | Optical observation instrument and a method of controllably adjusting a refractive power in such instrument | Oliver Baumann, Michael J. Claus, Markus Haidl, Gerhard Kelch, Timo Kratzer +3 more | 2011-10-18 |