Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887284 | Method of checking the presence or absence of an X-ray sheet film in a casette introduced into an apparatus for unloading or loading a sheet film into the cassette, and a device for carrying out the method | Walter Bauer, Ernst Widemann | 1989-12-12 |
| 4857560 | Reaction products useful as catalysts in the production of isocyanate-based plastics | Claus-Dieter Sommerfeld, Christoph Prolingheuer, Walter Klan | 1989-08-15 |
| 4844842 | Air humidifier for dry treatment device for photographic material | Maximilian Markl, Gunter Heidrich, Jurgen Muller, Dieter Wauer | 1989-07-04 |
| 4845252 | Method for the catalytic epoxidation of olefins with hydrogen peroxide | Guenter Prescher, Johann Buchler, Axel Kleemann | 1989-07-04 |
| 4842776 | Styrylaryloxy ether sulfonates, a process for their preparation and their use in the recovery of crude oil | Walter Rupp, Gerhart Schneider, Eva M. Kohn | 1989-06-27 |
| 4823535 | Device for unloading X-ray film cassettes | Johann Zanner | 1989-04-25 |
| 4819317 | Arrangement for unloading and loading of x-ray film cassettes | Walter Bauer, Herbert Plaschke, Otto Butz | 1989-04-11 |
| 4816412 | Method for the determination of the content of solid carbon compounds in soil samples | Horst Fechter | 1989-03-28 |
| 4811547 | Device for loading and unloading X-ray film cassettes | Herman Raats, Johann Zanner | 1989-03-14 |