Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12043974 | Specialized civil engineering machine, in particular slotted wall milling machine | — | 2024-07-23 |
| 11248363 | Work machine having adjustable hydraulic motors | Wilhelm Krautler | 2022-02-15 |
| 6605210 | Hydraulic fluid filter device | — | 2003-08-12 |
| 6520506 | Radial shaft seal | Rolf Stadler, Rolf Vogt | 2003-02-18 |
| 6367812 | Radial shaft-sealing ring and process for manufacturing the same | Rolf Vogt | 2002-04-09 |
| 5772868 | Hydraulic filter circuit with pressure maintaining valves, bypass and vent | — | 1998-06-30 |
| 4617513 | Measurement device for use in high-voltage gas-insulated switch gear | — | 1986-10-14 |
| 4350667 | Extraction of copper from an ammoniacal copper solution | Sven Andersson, Harald D. Ottertun | 1982-09-21 |
| 4252621 | Process of regenerating an ammoniacal etching solution | Harald D. Ottertun | 1981-02-24 |
| 4226791 | Method and a reagent mixture for removing metal ions from an aqueous solution by means of liquid-liquid extraction | Harald D. Ottertun | 1980-10-07 |
| 4203964 | Re-extracting metal chloride complex from an organic extraction solution | Ulf V. Kuylenstierna | 1980-05-20 |