AU187504B - Improvements in telegraphic signalling keys
- Google Patents
Improvements in telegraphic signalling keys
Info
Publication number
AU187504B
AU187504BAU1875/04AAU187504AAU187504BAU 187504 BAU187504 BAU 187504BAU 1875/04 AAU1875/04 AAU 1875/04AAU 187504 AAU187504 AAU 187504AAU 187504 BAU187504 BAU 187504B
Authority
AU
Australia
Prior art keywords
keys
telegraphic
signalling
telegraphic signalling
signalling keys
Prior art date
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.)
Ambrose Fleming Doctor Uf Schenck University College Gower Streed London England John
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
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Priority to AU1875/04ApriorityCriticalpatent/AU187504A/en
Priority claimed from AU1875/04Aexternal-prioritypatent/AU187504A/en
Publication of AU187504BpublicationCriticalpatent/AU187504B/en
Publication of AU187504ApublicationCriticalpatent/AU187504A/en