Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TEZELLA GmbH
Original Assignee
TEZELLA GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TEZELLA GmbHfiledCriticalTEZELLA GmbH
Application grantedgrantedCritical
Publication of FR699092ApublicationCriticalpatent/FR699092A/fr
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
General Physics & Mathematics
(AREA)
Audible And Visible Signals
(AREA)
FR699092D1929-07-191930-07-18Dispositif indicateur de la durée d'attente, notamment pour cabines téléphoniques
ExpiredFR699092A
(fr)