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DE556798C
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Process for the preparation of amines
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DE445503C
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Procedure for dissolving and reprecipitating keratins (horny substances)
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DE442520C
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Process for dissolving and reprecipitating collagen or glutin
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DE434570C
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Method for shearing skins and pelts
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DE411661C
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Procedure for the control of tannins during production and use on the farm
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DE417707C
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Process for the protection of animal and vegetable fibers
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DE512266C
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Mouth corner protectors holding themselves by their own clamping effect
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