G08B

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Description

SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS (signalling arrangements on vehicles B60Q, B62D 41/00; railway signalling systems or devices B61L; on cycles B62J 3/00, B62J 6/00; safes or strong-rooms with alarm devices E05G; signalling or alarm devices in mines E21F 17/18; sensitive measuring elements, see the appropriate subclasses of G01; traffic control systems G08G; visual indicating means G09; sound-producing devices G10; radio or near-field calling systems H04B 5/00, H04B 7/00; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers H04R)

Subclasses

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Subclass Title
1/00 Systems for signalling characterised solely by the form of transmission of the signal
1/02 Systems for signalling characterised solely by the form of transmission of the signal using only mechanical transmission
1/04 Systems for signalling characterised solely by the form of transmission of the signal using hydraulic transmission; using pneumatic transmission
1/06 Systems for signalling characterised solely by the form of transmission of the signal using hydraulic transmission; using pneumatic transmission hydraulic only
1/08 Systems for signalling characterised solely by the form of transmission of the signal using electric transmission

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