DK35436C
(en )
1925-12-28
Procedure for Reducing Cross Speech in Telephone Cables.
DK39833C
(en )
1929-02-25
Magnetic alloy, especially for use in the manufacture of telegraph and telephone cables.
DK39832C
(en )
1929-02-25
Alloy for Loading Telephone and Telegraph Cables.
DK34950C
(en )
1925-08-31
Procedure for Reducing Cross Speech in Telephone Cables.
DK38936C
(en )
1928-07-02
Magnetic alloys, especially for use in the manufacture of telegraph and telephone cables.
DK39558C
(en )
1928-12-03
Procedure for Abolition of Cross Speech in Telephone Cables.
DK38857C
(en )
1928-06-11
Device for terminating telephone cables and the like.
DK35869C
(en )
1926-04-12
Earpiece for Telephones and similar Devices.
DK39297C
(en )
1928-09-24
Alloy for the manufacture of load wires and the like for telephone lines.
ES116507A1
(en )
1930-02-16
Improvements in networks or telephone lines.
DK39685C
(en )
1929-01-07
Procedure for Reducing Cross Speech and Listening in Telephone Double and Duplex Cables.
ES94935A1
(en )
1926-01-01
Installation in microphone and telephone devices.
DK44466C
(en )
1931-08-10
Apparatus for extruding metal pipes and similar serving apparatus.
DK40925C
(en )
1929-10-14
Device for hanging cables and the like.
DK40683C
(en )
1929-08-26
Procedure and Cable for Reducing Cross Speech and Listening in Telephone Double Wires and Duplex Wires.
ES95822A1
(en )
1926-02-16
An improvement in telephone installations.
ES117322A1
(en )
1930-05-01
Improvements in telephone devices.
DK40466C
(en )
1929-07-15
Quaternary Alloy for Load Material for Telegraph and Telephone Cables.
DK47658C
(en )
1933-08-21
Pole for electric accumulators and the like.
DK46543C
(en )
1932-11-28
Protective device for telephone cords and the like.
DK46278C
(en )
1932-10-03
Impulse transmitter for use in automatic telephone systems and the like.
DK47748C
(en )
1933-09-11
Procedure for Manufacturing Completely Matured Yeast and Apparatus for Carrying Out the Procedure.
ES102128A1
(en )
1927-05-01
Improvements in the installations of networks and telephone exchanges.
DK45453C
(en )
1932-03-29
Coupling device for Telephone system with Selector operation and Voice current amplifiers.
DK45748C
(en )
1932-05-30
Coupling device for Telephone system with Selector operation and Voice current amplifiers.