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B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
B29B13/00—Conditioning or physical treatment of the material to be shaped
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FR866134D1940-03-041940-03-04
Improvements to molds for the manufacture of molded plastic articles
ExpiredFR866134A
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