IPC Subgroup
G08B 5/4 using smoke, fire or coloured gases
Introduced: September 1968
Last revised: January 2006
Full Title
Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied > using smoke, fire or coloured gases
Classification Context
- Section:
- PHYSICS
- Class:
- SIGNALLING
- Subclass:
- SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
Scope Notes
Application references: Sky-writing