Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7292354 | Apparatus for photoelectric measurement of an original | Guido Keller | 2007-11-06 |
| 5426508 | Manual densitometer with manully operated dial | — | 1995-06-20 |
| 4968140 | Manual device for the determination or measurement of photometric data using a measuring head | Markus Berner, Lido Feri, Wilhelm Koch | 1990-11-06 |
| 4961646 | Manual device for the detection of optical reflection properties | Markus Berner, Hans Ott | 1990-10-09 |