C09K 11/661 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

C09K 11/661

Full Title

Luminescent materials, e.g. electroluminescent or chemiluminescent > containing inorganic luminescent materials > containing germanium, tin or lead

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.