IPC Subgroup
G09B 11/06 Devices involving the use of transparent or translucent tracing material, e.g. copy books
Introduced: September 1968
Last revised: January 2006
Full Title
Teaching hand-writing, shorthand, drawing, or painting > Devices involving the use of transparent or translucent tracing material, e.g. copy books
Classification Context
- Section:
- PHYSICS
- Class:
- EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- Subclass:
- EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS