Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied

Child Classifications

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• G08B 5/002
• G08B 5/004
• G08B 5/006
• G08B 5/008
• G08B 5/02 using only mechanical transmission
• G08B 5/06 using hydraulic transmission; using pneumatic transmission
• G08B 5/22 using electric transmission; using electromagnetic transmission
• G08B 5/40 using smoke, fire or coloured gases