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CPC Subclass Not Allocatable Additional Only
Y10S

TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Description

Y10S is a CPC tagging class that bridges historical USPC (United States Patent Classification) cross-reference art collection systems to the modern IPC/CPC framework. It serves as a residual category for technical subjects that were previously organized under USPC cross-reference digests but do not fit cleanly into standard IPC classifications. Patents assigned to Y10S typically address interdisciplinary or emerging technology areas that span multiple technical fields. This class is primarily used for archival and searching purposes rather than primary classification, helping practitioners locate patents originally classified under legacy USPC systems.

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