Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824022 | Method of and apparatus for applying a sprayed concrete layer to a surface | Bernd Hillemeier, Gunter Brockmann | 1989-04-25 |
| 4804563 | Method and apparatus for the spray placing of concrete layers | Bernd Hillemeier, Gunter Brockmann | 1989-02-14 |