Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8551306 | Permanent cathode | Lauri Palmu, Henri Virtanen, Ismo Virtanen | 2013-10-08 |
| 7677860 | Method and apparatus for transferring sheet-like objects | Tom Marttila | 2010-03-16 |
| 7597786 | Transfer and insulation device for electrolysis | Tom Marttila | 2009-10-06 |
| 6937167 | Method for joining a jacket element and a core element together | Veikko Polvi, Veijo Halminen | 2005-08-30 |
| 6793783 | Element for separating an electrolytic tank | — | 2004-09-21 |
| 6736970 | Arrangement for treating solids settled on the bottom of an electrolytic tank | Lauri Palmu, Raimo Syväluoma, Jari Stenroos | 2004-05-18 |
| 6673228 | Arrangement for cleaning the bottom of an electrolytic tank | Jari Stenroos | 2004-01-06 |
| 6342136 | Busbar construction for electrolytic cell | Henri Virtanen, Ismo Virtanen, Tom Marttila | 2002-01-29 |
| 6187156 | Anode for electrolytic refining | Henri Virtanen, Ismo Virtanen, Tom Marttila | 2001-02-13 |
| 5799529 | Method for straightening and machining an anode lug | Tom Marttila | 1998-09-01 |
| 5151006 | Automatic charging member | Tom Marttila, Pentti V. Ahola | 1992-09-29 |
| 4925598 | Aerator for industrial and domestic wastewaters | Tauno T. Koho, Arvo E. Andersson | 1990-05-15 |
| 4703846 | Method and apparatus for arranging fragmentary particles into a row consisting of individual particles | Karl O. Salminen, Heimo J. Heino, Pertti T. Lehtonen, Seppo Koskinen, Lasse J. Rinta-Keturi +1 more | 1987-11-03 |
| 4566968 | Apparatus for leading off froth from the tank of a flotation cell | Kai B. Fallenius, Timo Niitti | 1986-01-28 |
| 4413495 | Method for the stiffening and straightening of starting sheets | Eino J. Peuhkurinen, Erkki J. Linnanketo, Kari Farm, Tauno T. Koho, Seppo T. Kinnunen +1 more | 1983-11-08 |