Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B28
WORKING CEMENT, CLAY, OR STONE
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B28B
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
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3/00
Producing shaped articles from the material by using presses; Presses specially adapted therefor
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B28B3/20
wherein the material is extruded
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B28B3/2645
using means for inserting reinforcing members
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