Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4934665 | Apparatus for preparing binderfree hot briquettes for smelting purposes | Erich Hoffken, Rudolf Auth, Lothar Seidelmann | 1990-06-19 |
| 4853031 | Process for preparing binderfree hot briquettes for smelting purposes | Erich Hoffken, Rudolf Auth, Lothar Seidelmann | 1989-08-01 |
| 4645184 | Apparatus for preparing binder-free hot-briquets | Heinrich Rellermeyer | 1987-02-24 |
| 4533384 | Process for preparing binder-free hot-briquets | Heinrich Rellermeyer | 1985-08-06 |
| 4336218 | Method for recovering residual matter accumulated in the production and machining of steel | Hans-Helmut Borggrefe, Klaus Unger | 1982-06-22 |
| 4308055 | Process of briquetting sponge iron-containing material | Harry Serbent, Horst Steinhofel, Justus Kuhn, deceased | 1981-12-29 |