Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04D
ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
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3/00
Roof covering by making use of flat or curved slabs or stiff sheets
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E04D3/361
by specially-profiled marginal portions of the slabs or sheets
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E04D3/362
by locking the edge of one slab or sheet within the profiled marginal portion of the adjacent slab or sheet, e.g. using separate connecting elements
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