using semiconductor devices, e.g. bipolar elements (G11C17/06, G11C17/14 take precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: using semiconductor devices, e.g. bipolar elements

CPC: using semiconductor devices, e.g. bipolar elements (G11C17/06, G11C17/14 take precedence)

Full Title

Full titles differ between systems:

IPC:

Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards > using semiconductor devices, e.g. bipolar elements

CPC:

Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards > using semiconductor devices, e.g. bipolar elements (G11C17/06, G11C17/14 take precedence)

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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G11C 17/10 in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM since 1990 IPC+CPC Available in IPC and CPC