Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758502 | Coupling ring for ventilation ducts, and method of connecting ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2004-07-06 |
| D475781 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2003-06-10 |
| 6561228 | Helically wound lock seam tube | — | 2003-05-13 |
| 6513553 | Helically wound lock-seam tube | — | 2003-02-04 |
| D461887 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2002-08-20 |
| D456072 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2002-04-23 |
| D456071 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2002-04-23 |
| D454949 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2002-03-26 |
| D453042 | Coupling ring for ventilation ducts | Lars-åke Mattsson, Sten Högman, Carl-Gustaf Sonden | 2002-01-22 |
| D447223 | Sealing rings for ventilation ducts | Lars-åke Mattsson, Pontus Andersson, Tomas Persson | 2001-08-28 |
| 6170883 | Tubular element with sealing means and a method for manufacturing the tubular element | Lars-åke Mattsson, Pontus Andersson, Tomas Persson | 2001-01-09 |
| 6085801 | Helically wound lock-seam tube | — | 2000-07-11 |
| 6003220 | Method and apparatus for producing helically wound lock-seam tubing | — | 1999-12-21 |
| 5720095 | Method and apparatus for producing helically wound lock-seam tubing | — | 1998-02-24 |
| D386246 | Circular sleeve coupling | Carl-Gustaf Sonden | 1997-11-11 |
| D383195 | Circular sleeve coupling | Carl-Gustaf Sonden | 1997-09-02 |
| D383196 | Circular sleeve coupling | Carl-Gustaf Sonden | 1997-09-02 |
| D379358 | Clinching roller | — | 1997-05-20 |
| 5618142 | Self-drilling blind rivet and method for making a pressure tight riveted joint by means of the same | Carl-Gustaf Sonden | 1997-04-08 |
| D376193 | Helically wound lock-seam tube | — | 1996-12-03 |
| 5531460 | U-shaped sealing device on a pipe | Lars Stefansson | 1996-07-02 |
| D367316 | Circular sleeve coupling | Carl-Gustaf Sonden | 1996-02-20 |
| 5473815 | Method for producing a connector for fluid pipe elements | Carl-Gustaf Sonden | 1995-12-12 |
| D363115 | Component part of a T-piece | — | 1995-10-10 |
| D362299 | Circular sleeve coupling | Carl-Gustaf Sonden | 1995-09-12 |