Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886393 | Pretreatment of solid wastes, and wastes to be compacted, for introduction into underground salt cavities of salt caverns via a downpipe under the force of gravity | Wilhelm Jahn-Held, Friedel Wartenpfuhl | 1989-12-12 |