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| US5240533 | 24 août 1992 | 31 août 1993 | Vorwerk & Co. Interholding GmbH | Method of fabricating a structural element formed of a resin-hardened velour fabric |
| US5480697 | 8 avr. 1993 | 2 janv. 1996 | Vorwerk & Co. Interholding GmbH | Structural part based on a sandwich fabric |
| US5706590 | 19 sept. 1996 | 13 janv. 1998 | Microlite, S.L. | Sole for footwear made at least partially of vegetable fibres |
