CH54232A
(en )
1912-05-01
Automatic telephone dialer
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
FR423356A
(en )
1911-04-14
Telephone instruments
CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
AT80097B
(en )
1920-02-25
Telephone dialer. Telephone dialer.
FR415455A
(en )
1910-09-27
Automatic telephone
CH59025A
(en )
1913-04-16
Telephone system dialers
CH49554A
(en )
1911-02-16
Automatic cradle
AT65751B
(en )
1914-07-25
Circuit for semi-automatic telephone systems.
AU1822410B
(en )
1910-11-08
Automatic telephone exchanges
AT48831B
(en )
1911-07-10
Telephone.
FR412922A
(en )
1910-07-27
Telephone transmitter
CH54933A
(en )
1912-07-01
Equipment for automatic or partially automatic telephone systems
FR416479A
(en )
1910-10-21
Auxiliary telephone receiver
CH57659A
(en )
1913-03-01
Device for semi-automatic telephone systems
FR436383A
(en )
1912-03-26
Telephone receiver
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
ES48933A1
(en )
1910-11-16
An articulated microphone holder for telephone sets.
AT54954B
(en )
1912-08-26
Circuit arrangement for dialers of self-connecting telephone systems.
CH56245A
(en )
1912-10-16
Call counters for telephone stations
FR444993A
(en )
1912-10-30
Telephone receiver
CH63446A
(en )
1914-02-02
Telephone receiver
CH55448A
(en )
1912-08-16
Call counting device for telephone systems
CH52337A
(en )
1911-11-16
Call counting device for telephone systems