DIFF Subgroup
G09B 23/28 for medicine
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes > for medicine
CPC:
Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes (in the nature of toys A63H) > for medicine
CPC subdivides this area 6x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
Child Classifications
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