FR38340E
(en )
1931-05-12
Telephone circuit combination system
DK45217C
(en )
1932-02-08
Circuit arrangement for an automatic telephone system.
DK45941C
(en )
1932-07-18
Circuit arrangement for automatic telephone systems.
DK45984C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK46218C
(en )
1932-09-19
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45839C
(en )
1932-06-20
Circuit device for a Telephone system.
AT126865B
(en )
1932-02-25
Circuit arrangement for automatic telephone systems.
DK45359C
(en )
1932-03-07
Circuit Device for Automatic Telephone Systems.
DK46657C
(en )
1932-12-19
Circuit device for automatic Telephone Systems.
DK43996C
(en )
1931-04-13
Circuit arrangement for automatic telephone systems.
AT126867B
(en )
1932-02-25
Automatic telephone system.
ES115727A1
(en )
1929-12-16
An automatic circuit breaker.
AT121482B
(en )
1931-02-25
Circuit arrangement for telephone systems.
DK45907C
(en )
1932-07-11
Circuit arrangement for fully and semi-automatic Telephone Systems.
DK45439C
(en )
1932-03-21
Circuit arrangement for fully or semi-automatic Telephone systems.
DK45876C
(en )
1932-07-04
Circuit arrangement for automatic telephone systems.
DK44558C
(en )
1931-09-07
Circuit device for automatic telephone systems.
AT126861B
(en )
1932-02-25
Installation on automatic telephone systems.
DK44187C
(en )
1931-06-01
Automatic Telephone System.
DK45164C
(en )
1932-02-01
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45641C
(en )
1932-05-09
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK47425C
(en )
1933-06-12
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK41793C
(en )
1930-03-10
Selector for automatic Telephone Systems.
DK45470C
(en )
1932-03-29
Circuit arrangement for fully or semi-automatic Telephone Systems.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.