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Alf Birkenstock
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Heiligenhaus, DE
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Patents Grants
last 30 patents
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Patent Grant
Method for producing a plurality of curved extruded profiles
Patent number
7,197,907
Issue date
Apr 3, 2007
WKW Erbsloh Automotive GmbH
Alf Birkenstock
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for cutting extruded profile sections into lengths
Patent number
6,862,911
Issue date
Mar 8, 2005
WKW Erbsloh Automotive GmbH
Alf Birkenstock
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for manufacturing structural components from an extruded sec...
Patent number
6,843,093
Issue date
Jan 18, 2005
Erbsloh Aktiengesellschaft
Karl-Heinz Lindner
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Patents Applications
last 30 patents
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Patent Application
Method for producing a plurality of bent extruded profiles
Publication number
20060156780
Publication date
Jul 20, 2006
Alf Birkenstock
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Lightweight construction element and method for producing the same
Publication number
20050016108
Publication date
Jan 27, 2005
Karl-Heinz Lindner
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
Method for cutting extruded profile sections into lengths
Publication number
20040163438
Publication date
Aug 26, 2004
Alf Birkenstock
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Method for manufacturing structural components from an extruded sec...
Publication number
20040045335
Publication date
Mar 11, 2004
Karl-Heinz Lindner
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...