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Patents
Organic compounds -- part of the class 532-570 series Patents (Class 564)
Organic Compounds -- Part Of The Class 532-570 Series Patents (Class 564)
Organic compounds (class 532, subclass 1)
AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) (Class 564/1)
Foreign Patent Art Collections
Class-related foreign documents (Class 564/FOR000)