AU160933B2
(en )
1952-01-31
Improvements in automatic telephone systems
AU655151A
(en )
1952-01-31
Improvements in automatic telephone systems
CA477173A
(en )
1951-09-25
Automatic telephone systems
CA478353A
(en )
1951-11-06
Automatic telephone systems
AU157231B2
(en )
1951-07-19
Improvements in telecommunication systems
AU150763B2
(en )
1951-05-17
Improvements in circuit-arrangements for use in telephone systems
AU264251A
(en )
1951-07-19
Improvements in telecommunication systems
AU155538B2
(en )
1952-04-03
Improvements in automatic telephone systems
CA477986A
(en )
1951-10-23
Telephone systems
CA470842A
(en )
1951-01-16
Telephone systems
CA472098A
(en )
1951-03-13
Telephone systems
CA476517A
(en )
1951-08-28
Telephone systems
CA468357A
(en )
1950-09-26
Automatic telephone systems
AU143151A
(en )
1951-05-17
Improvements in circuit-arrangements for use in telephone systems
AU776252A
(en )
1952-04-03
Improvements in automatic telephone systems
AU152947B2
(en )
1951-08-02
Improvements in mounting arrangements for automatic switches ofthe type used in telephone and like systems
AU153022B2
(en )
1951-03-22
Improvements in or relating to switching devices for use in automatic telephone systems or similar systems
AU165026B2
(en )
Improvements in automatic telephone systems
CA471340A
(en )
1951-02-06
Telecommunication systems
CA489269A
(en )
1952-12-30
Automatic telephone systems
AU294451A
(en )
1951-08-02
Improvements in mounting arrangements for automatic switches ofthe type used in telephone and like systems
CA476115A
(en )
1951-08-14
Telephone transmission systems
CA478159A
(en )
1951-10-30
Telephone exchange systems
AU27651A
(en )
1951-03-22
Improvements in or relating to switching devices for use in automatic telephone systems or similar systems
CA470526A
(en )
1951-01-02
Party line telephone systems