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Gummar Cederqvist
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S Lerdala, SE
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Patent Grant
Method for the production of a fibrous mat
Patent number
4,284,471
Issue date
Aug 18, 1981
Rockwool Aktiebolaget
Gummar Cederqvist
B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...