Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867942 | Process for the preparation of an effervescent granular material, effervescent granular material prepared by this process, as well as the use thereof | Gerhard Gergely, Irmgard Gergely, Thomas Gergely | 1989-09-19 |