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| US7736463 | 7 Mar 2000 | 15 Jun 2010 | Holmen Aktiebolag | Method for manufacturing bleached mechanical and chemithermomechanical pulp |
| US7967948 | 2 Jun 2006 | 28 Jun 2011 | International Paper Company | Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents |
