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Improvement concerning the manufacture of rubber articles.
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Improvements in the manufacture of shoes and rubber boots and similar items.
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Improvements in the manufacture of articles from rubber compositions
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Method of manufacturing rubber or similar compositions and rubber articles.
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Process for the production of open hollow rubber and hard rubber articles
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Perfections regarding the manufacture of balls and other hollow and inflated articles of rubber and the like.
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Method of manufacturing rubber or similar compositions and rubber articles.
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Method of manufacturing rubber or similar compositions and rubber articles.
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