DIFF Subgroup
G11C 17/14 in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
Introduced: January 1990
Full Title
Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards > in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
Of 4 combined children, 2 exist in both systems.
2 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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- G11C 17/18 Auxiliary circuits, e.g. for writing into memory since 1990 IPC+CPC Available in IPC and CPC