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B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
B29D12/00—Producing frames
B29D12/02—Spectacle frames
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FR595520D1925-03-201925-03-20Nouveau mode de fabrication des cercles de lunettes, pince-nez, etc., en celluloïd ou autre matière plastique
ExpiredFR595520A
(fr)