Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4915213 | Arrangement in a belt conveyor | Arne E. Wall, Olle L. Siwersson | 1990-04-10 |
| 4905920 | Milling device | Olle L. Siwersson, Arne E. Wall | 1990-03-06 |
| 4803932 | Burner for a suspension of fine-grained coal in liquid | Olle L. Siwersson, Arne E. Wall | 1989-02-14 |
| D297722 | Collapsible wheel chair | Olle L. Siwersson | 1988-09-20 |
| 4724952 | Single-belt conveyor | Arne E. Wall | 1988-02-16 |
| 4693490 | Collapsible wheel-chair | Olle L. Siwersson | 1987-09-15 |
| 4217109 | Composition comprising a pulverized purified substance, water and a dispersing agent, and a method for preparing the composition | Olle L. Siwersson, Arne E. Wall | 1980-08-12 |