DIFF Subgroup
G11C 13/04 using optical elements
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Digital stores characterised by the use of storage elements not covered by groups , , or > using optical elements
CPC:
Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 > using optical elements
CPC subdivides this area 5x more granularly than IPC with 4 additional codes.
4 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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