IPC Subgroup
A63J 5/1 Arrangements for making visible or audible the words spoken
Introduced: September 1968
Last revised: January 2006
Full Title
Auxiliaries for producing special effects on stages, or in circuses or arenas > Arrangements for making visible or audible the words spoken
Classification Context
- Section:
- HUMAN NECESSITIES
- Class:
- SPORTS; GAMES; AMUSEMENTS
- Subclass:
- DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE