Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365306 | Method and apparatus for regulation of the amount of printing light in photographic enlarging or printing devices | Verner Delueg | 1994-11-15 |
| 4920378 | Method and a measuring apparatus for determining the exposure time in photographic copying | — | 1990-04-24 |
| 4728992 | Process and a device for adjusting a photographic color enlarging or copying apparatus | Florian Vikoler | 1988-03-01 |
| 4285593 | Circuit for the control of exposure time in photographic enlarging equipment | — | 1981-08-25 |