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DIFF Subgroup
G09B 23/04

for geometry, trigonometry, projection or perspective (for surveying G09B25/06)

Introduced: September 1968

Title

Titles differ between systems:

IPC: for geometry, trigonometry, projection, or perspective

CPC: for geometry, trigonometry, projection or perspective (for surveying G09B25/06)

Full Title

Full titles differ between systems:

IPC:

Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes > for mathematics > for geometry, trigonometry, projection, or perspective

CPC:

Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes (in the nature of toys A63H) > for mathematics (for statics or dynamics G09B23/08) > for geometry, trigonometry, projection or perspective (for surveying G09B25/06)

No child classifications to compare. This is a leaf node in both IPC and CPC.