AU440821A - Improvements relating to automatic and semiautomatic telephone systems - Google Patents

Improvements relating to automatic and semiautomatic telephone systems

Info

Publication number
AU440821A
AU440821A AU4408/21A AU440821A AU440821A AU 440821 A AU440821 A AU 440821A AU 4408/21 A AU4408/21 A AU 4408/21A AU 440821 A AU440821 A AU 440821A AU 440821 A AU440821 A AU 440821A
Authority
AU
Australia
Prior art keywords
automatic
improvements relating
telephone systems
semiautomatic telephone
semiautomatic
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.)
Expired
Application number
AU4408/21A
Inventor
Klectrical Engineer Viewlands Shrewsbury Lane Shunter'Shill L odon SE. England David Adam Christian
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Publication of AU440821A publication Critical patent/AU440821A/en
Expired legal-status Critical Current

Links

AU4408/21A Improvements relating to automatic and semiautomatic telephone systems Expired AU440821A (en)

Publications (1)

Publication Number Publication Date
AU440821A true AU440821A (en) 1922-10-10

Family

ID=

Similar Documents

Publication Publication Date Title
AU1405323A (en) Improvements relating to automatic and semiautomatic telephone systems
AU440821A (en) Improvements relating to automatic and semiautomatic telephone systems
AU397021A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU438521A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU594722A (en) Improvements in automatic and semiautomatic telephone systems
AU594822A (en) Improvements in automatic and semiautomatic telephone systems
AU60926A (en) Improvements relating to automatic and semiautomatic telephone systems
AU2079324A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU1773424A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU2278825A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU1914124A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU1832924A (en) Improvements in or relating to automatic or semiautomatic telephone systems
CA226467A (en) Automatic telephone system
CA216862A (en) Automatic telephone system
CA220101A (en) Automatic telephone system
CA218678A (en) Semi-automatic telephone system
AU2012124A (en) Improvements in or relating to automatic and semiautomatic telephone systems
AU2195325A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU2134625A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU2473425A (en) Improvements relating to automatic and semiautomatic telephone exchange systems
AU551622A (en) Improvements in and relating to automatic or semiautomatic telephone systems
AU1149123A (en) Improvements relating; to automatic and semiautomatic telephone exchange systems
AU982022A (en) Improvements relating to impulse transmitters, for automatic and semiautomatic telephone systems
AU1485920A (en) Improvements in or relating to automatic or semiautomatic telephone systems
AU1519120A (en) Improvements in or relating to automatic or semiautomatic telephone systems