Read-only memory [ROM] devices

Introduced: January 2023

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2023.

Child Classifications

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H10B 20/10 ROM devices comprising bipolar components since 2023 IPC+CPC Available in IPC and CPC
H10B 20/20 Programmable ROM [PROM] devices comprising field-effect components (H10B20/10 takes precedence) since 2023 IPC+CPC Available in IPC and CPC
H10B 20/27 +3 CPC CPC only CPC only
H10B 20/60 +1 CPC CPC only CPC only