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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G11C 17/12

using field-effect devices

Introduced: January 1990

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 > in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM > using field-effect devices

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) > in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM > using field-effect devices

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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