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Device and method for expansion forming
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Patent number 7,509,827
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Issue date Mar 31, 2009
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Avure Technologies AB
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Keijo Hellgren
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Method of exchanging a diaphragm device
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Patent number 7,320,211
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Issue date Jan 22, 2008
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Flow Holdings GmbH (SAGL) Limited Liability Company
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Keijo Hellgren
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Forming tool
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Patent number 7,155,948
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Issue date Jan 2, 2007
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Avure Technologies AB
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Keijo Hellgren
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Method for treatment of wood
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Patent number 6,183,812
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Issue date Feb 6, 2001
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Flow Holdings GmbH (SAGL) LLC
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Keijo Hellgren
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Device and method for shaping flat articles
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Patent number 6,178,796
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Issue date Jan 30, 2001
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Flow Holdings GmbH (SAGL) LLC
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Keijo Hellgren
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Press of pressure cell type
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Patent number 4,676,086
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Issue date Jun 30, 1987
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Asea Aktiebolag
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Keijo Hellgren
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Hydraulic press
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Patent number 4,163,378
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Issue date Aug 7, 1979
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ASEA Aktiebolag
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Keijo E. Hellgren
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Hydraulic press
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Patent number 4,105,388
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Issue date Aug 8, 1978
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ASEA Aktiebolag
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Keijo Hellgren
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B30 - PRESSES