GB2014798A
(en )
1979-08-30
Telephone network/subscriber interface device
JPS53136904A
(en )
1978-11-29
Device for automatically dialing telephone
JPS55135458A
(en )
1980-10-22
Pushhbutton dial device for telephone
GB1550721A
(en )
1979-08-22
Circuit arrangement for a loudspeaking telephone
MY8800007A
(en )
1988-12-31
A telephone set
JPS5376605A
(en )
1978-07-07
Telephone exchange subscriber line device
GB2014825B
(en )
1982-03-31
Telephone subscriber apparatus
JPS52109314A
(en )
1977-09-13
Telephone transfer device
ZA79633B
(en )
1980-02-27
Telephone subscriber apparatus
GB2013069B
(en )
1982-02-17
Telephone answering device
JPS5375709A
(en )
1978-07-05
Handdfree telephone set
JPS5368108A
(en )
1978-06-17
Telephone exchange subscriber line device
BG25665A3
(en )
1978-11-10
A device for group connection of telephone subscribers
JPS5477502A
(en )
1979-06-21
Device for charging telephone handset
JPS531A
(en )
1978-01-05
Terminal device for telecommunication
GB2037540B
(en )
1982-08-18
Monitoring device for monitoring telephone calls coming through a subscriber station
IE44788L
(en )
1977-09-16
Telephone subscriber connection device
AU2490377A
(en )
1978-11-09
A telephone group exclusion circuit
CA1023153A
(en )
1977-12-27
Timing device for accumulating a telephone long distance call charge
JPS52130203A
(en )
1977-11-01
Device for indicating called line of telephone
JPS52142907A
(en )
1977-11-29
Device for indicating telephone number
JPS5299098A
(en )
1977-08-19
Operatorless telephone calling device
JPS534405A
(en )
1978-01-17
Ringing counter for automatic answering telephone system
CA40751S
(en )
1976-05-31
Telephone answering device
AU79676S
(en )
1980-07-02
a telephone answering device