Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950434 | Arrangement for the production of longitudinal screed slabs consisting of concrete | Lennart Johansson | 1990-08-21 |
| 4884384 | Arrangement for laying concrete floors | Lennart Johansson | 1989-12-05 |
| 4838000 | Arrangement for improved ventilation and method of using the arrangement | — | 1989-06-13 |
| 4783943 | Device for floor ventilation | — | 1988-11-15 |
| 4576510 | Technique for the location of expansion joints when casting a concrete bed | Lennart Johansson | 1986-03-18 |