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Johann Offermann
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9579. Offermann, J. April 14. Felt is treated to imitate double-woven fabrics by first napping on both sides and then cropping the nap on the right side, after which the felt is pressed and steamed and finally finished by repeated napping.
GB189709579D1897-04-141897-04-14Improvements in the Treatment of Felt to Imitate Double Woven Fabrics.
ExpiredGB189709579A
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