Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5051217 | Process for the production of building units from afterhardening materials | Tibor Alpar, Erno Schmidt | 1991-09-24 |
| 4927573 | Process for the production of building units from afterharding materials | Tibor Alpar, Erno Schmidt | 1990-05-22 |
| 4917587 | Apparatus for the production of building units from afterhardening materials | Tibor Alpar, Erno Schmidt | 1990-04-17 |