FR880734A
(en )
1943-04-02
Telephone headsets
FR862867A
(en )
1941-03-18
Loud speaker
CH267007A
(en )
1950-02-28
Telephone set.
FR866096A
(en )
1941-06-16
Circuits for telephone sets
DK63527C
(en )
1945-05-28
Telephone subscriber device of the Table type and with Microphone.
FR50919E
(en )
1941-05-10
Telephone handsets
CH218528A
(en )
1941-12-15
Telephone subscriber station.
FR861055A
(en )
1941-01-31
Telephone device, especially with loudspeaker
FR938499A
(en )
1948-09-16
Telephone microphone
FR881760A
(en )
1943-05-07
Subscriber telephone sets
FR943739A
(en )
1949-03-16
Device, called line circuit, ensuring the connection of subscribers in telephone networks
GR8418B
(en )
1939-08-09
AUTOMATIC TELEPHONE CONVERSATION RECORDING DEVICE ATTACHED TO THE AUTOMATIC PHONE AND WITHOUT ADDITIONAL CONDUCT
CH220359A
(en )
1942-03-31
Extension piece to telephone device.
FR852417A
(en )
1940-02-01
Telephone amplifier
DK58387C
(en )
1941-02-03
Automatic Telephone
DK59184C
(en )
1941-11-10
Connecting device for Telephone systems with Main and Sub-exchanges.
DK59364C
(en )
1942-01-05
Connecting device for Telephone systems with Main and Sub-exchanges.
DK60316C
(en )
1942-11-09
Connecting device for Telephone systems with Main and Sub-exchanges.
DK74303C
(en )
1952-06-16
Telephone device of the standing microphone type.
CH219812A
(en )
1942-02-28
Telephone.
DK59584C
(en )
1942-03-23
Handheld microphone with dial.
CH244726A
(en )
1946-09-30
Circuit arrangement in telephone subscriber sets.
GR8466B
(en )
1939-09-05
HEALTH CONDOMINATION DEVICE FOR TELEPHONE INSTRUMENTS OF THE TYPE HAND HOLDING MICROPHONE.
ES148769A1
(en )
1942-02-01
A TELEPHONE APPARATUS, ESPECIALLY WITH A SPEAKER
FR858403A
(en )
1940-11-25
Detachable telephone receiver