Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F27
FURNACES; KILNS; OVENS; RETORTS
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F27D
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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1/00
Casings; Linings; Walls; Roofs
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F27D1/04
characterised by the form; , e.g. shape; of the bricks or blocks used
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F27D1/06
Composite bricks or blocks; , e.g. panels, modules
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F27D1/08
Bricks or blocks with internal reinforcement or metal backing
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