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.

Of 274 combined children, 0 exist in both systems.

274 codes are CPC-only extensions.

Note: 274 CPC extensions are marked as secondary classification only.

This code exists only in CPC.

Diff view requires codes present in both systems.

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