Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831436 | Method of and apparatus for printing a color image using dichroic filters and a phosphor which strongly emits red light and weakly emits green and blue light | Klaus Birgmeir | 1989-05-16 |
| 4825296 | Method of and apparatus for copying originals in which an image to be printed is evaluated by observing a corresponding low-resolution video image | Hermann Fuchsberger, Wolfgang Ruf | 1989-04-25 |
| 4825297 | Method of and apparatus for electronic contrast enhancement of reproductions of two-dimensional transparent original images | Hermann Fuchsberger | 1989-04-25 |
| 4812903 | Method of electronically improving the sharpness and contrast of a colored image for copying | Wolfgang Ruf, Hermann Fuchsberger, Klaus Birgmeir | 1989-03-14 |