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Index to the USPC  

Index to the United States Patent Classification (USPC) System
 
   Preface to the Index to the USPC  
   Select the format and section (by letter) ...  
   Index in HTML A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
   Index in PDF A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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