DK44922C
(en )
1931-11-30
Circuit arrangement of a fully or semi-automatic Telephone system.
DK44998C
(en )
1931-12-14
Circuit arrangement for a fully or semi-automatic Telephone System.
DK45974C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45983C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45090C
(en )
1932-01-11
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45841C
(en )
1932-06-27
Circuit arrangement of semi-automatic Telephone Systems.
DK45470C
(en )
1932-03-29
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK46048C
(en )
1932-08-15
Circuit arrangement for fully or semi-automatic Telephone exchanges.
DK46766C
(en )
1933-01-16
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45091C
(en )
1932-01-11
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK46162C
(en )
1932-09-05
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK43359C
(en )
1930-11-17
Semi-automatic Telephone System.
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.
DK42942C
(en )
1930-09-08
Circuit arrangement for a telephone system.
DK42697C
(en )
1930-08-04
Circuit arrangement for a telephone system.
AT105745B
(en )
1927-02-25
Automatic telephone switchboard.
DK46338C
(en )
1932-10-17
Automatic or semi-automatic Telephone System.
DK44558C
(en )
1931-09-07
Circuit device for automatic telephone systems.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.
AT108193B
(en )
1927-12-10
Semi-automatic signal box.
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.
DK44113C
(en )
1931-05-11
Telephone system.
DK38904C
(en )
1928-06-25
Telephone system.